The DBV is less versatile, but obviously a better buy for you. The nice thing about the e-nano is that it's capable of being a sipper or a gulper, while the DBV encourages big hits all the time. You can load small and therefore take sips of vapor instead of gulps, but you'll feel like you're just taking hits of air. You'll get the effect of a small hit but not the sensation while taking it. Aside from that, the DBV is a good nominee for 'best buy in a plug-in vape'.
The tubing you get from 7th Floor won't be silicone (which has the least taste), but it doesn't men you're not getting a clean vapor path. What constitutes a clean vapor path is subjective and will vary according to the individual, but if it's clean to you coming out of the heater cover, then IMO it's clean all the way. Vape tubing never gets hot enough for it be an issue, other than taste, and the 7th Floor tubing was never a taste issue for me. YMMV.
I wouldn't call a typical e-nano load a 'micro load' myself, but it does depend on the grind consistency and what you're comparing it to. The old Purple Days was a real micro loader, as far as log vapes go. The e-nano, in comparison, can hold quite a bit- much larger diameter vaping stem/tube.
Ultimately, the answer to your question on whether the e-nano is worth the extra money or not is entirely subjective.
I seldom (actually never) disagree with Max, but think I have to here. Really hard for me to say if DBV stock tubing has a "taste". The smell turned me off too much to really get a feel for taste. Silicone is a necessary upgrade IMO, but it doesn't seem to bother many so you may be OK with it.
Also never had the opportunity to try a PD when they were available, but the nano is capable (and best IMO) with what I consider "micro" loads. I'd say about 1/2 of what you'd use in a full MFLB trench. That's not to say you can't put more in it. Most use something called an adjust-a-bowl that allows you to change size of the actual load "chamber".
I also don't know if I totally agree with the simple comparison between sipper and gulper as explained here. I've found the DBV to be extremely unsatisfying with smaller loads. Feeling like you are taking hits of air does describe it pretty well. If loaded as most do (with a fuller load) it is very hard to resist hitting it like the big hitter it intrinsically is. Also, taste will drop off quickly (usually in first couple hits with most vapes) which not only kills some of the thrill I get from vapor, but also makes it hard to judge where you are with your vaping due to less feedback.
By comparison, the nano and other log vapes can be easily used with much less material in a load. For me this is about 2 -3 hits, so flavor stays constant through the load. This leads me (and seems many others) to conserve much more. Can't honestly say whether this is because the nano is that much more effecient on a truly scientific scale, but I have always used much less material to get and maintain the same buzz as I would with a DBV or EQ.
I usually go through two loads (sometimes 3) with my nano for a good session. With my EQ I would do the same, and on a friends DBV I've used many times it would usually be about 2. Differences are that the 2 or 3 nano loads are still much less material, and of course it takes a bit more work and playing to dump and reload. I haven't done any scientific experiments to determine if I get the exact same amount of THC or other actives, but I do know I get and stay as stoned on less than 1/3 material with the nano than I used to with my EQ, or would probably get with DBV. YMMV, but seems this is pretty typical experience from reports of other users. May also be worth noting that EQ was my daily driver for more than 2 years, have used the DBV regularly (couple times a month unless I bring nano to friends) for more than 3, and nano has been my daily driver for about past 2 years.
What you'd want to get, and what you want out of it is very subjective. Some people really like the big pretty clouds and cool look of the DBV sitting on a table. It does look like it is there to do some serious business. But even without scientific studies, I think from all of the testimonials here on FC that the nano (or other log vapes) will lead to same results with much less material for most if not all users. For me that has converted to about $150 saved every month for past two years. And, when you're talking about spending $85 more out of the gate (lets say $100 to consider a $15 GonG for nano) - and probably another $50 - $100 for a decent cheap bubbler to get the most you can out it - to save over $3,000 in a 2 year period definitely ain't subjective for me!
