Flat coil is what you want for the SiC halo and the Liger with SiC. Honestly, if you are buying SiC, get the d-nail man. SiC conducts incredibly well, it will get the heat into whatever dab you can throw at it. I own both the Liger (with SiC and Sapphire) and all of the D-nail halos. I can tell you from experience that the halos heat more efficiently, get the dab boiled quicker and taste the same. They also cost a lot less (over $100 less than the liger for the equivalent setup!) and have much better carb caps and dabbers (their fork dabber is the best on the market IME and I've owned all of the screw-ins titanium dabber handles that you can imagine). They also do not move around when you are qtipping like the Liger inserts (UGH!!!). If you think you'll be predominately dabbing full melt, you might consider the 30mm liger but by the same token, if you're predominately dabbing full melt - buy the sapphire and be done with it. Sapphire is simply not expensive compared to the value of full melt Torch is the best way to clean SiC but keep in mind that the Liger SiC is an insert and you will need some surface you can rest it on to torch it clean. For the d-nail, you can simply take the coil off, put the SiC halo on the base without the coil and torch it til it looks new The liger has considerably more titanium vapor path before you vapor gets into your rig. This should be considered as the reclaim buildup in the titanium parts is definitely more with the Liger IME than the d-nail. That main arm that connects to the bucket gets filthy with a day or two of moderate usage! @nosmoking man I said the same shit as Sam above (except about the dab hitting the nut, yikes!)! The size difference between the SiC halo and TAG knock-off is very evident looking at the pictures. The TAG knock-off to me looks more comparable to an infiniti 'large' dish (@SamuraiSam could confirm this I'm sure), which was woefully inadequate for even moderate sized dabbing when I used it! Fuck the INFINITI by the way lol Most insanely overpriced nail I ever bought! What Sam says about the d-nail products being more dialled is the truth. Those guys have put in the hard engineering yards and the other vendors simply have not done comparable design and QC work with their nails. I have dealt with all of the expensive nail vendors and d-nails service and design is several cuts above! The carb caps, the dabbers, the bases all are easier to assemble and function better than my Ligers. This is not unremarkable as the d-nail is substantially cheaper than the liger equivalent, not to mention the halos came out first too! But I'm sure you get the picture now after Sam's and my own post above and my reiterations here.