Have you seen the fairly new Sapphire vaporizer by Storm? Only £55 at Vapefiend. It works very well, hits like a desktop. Very smooth, good taste which doesnt go bad at all, actually much more pleasant and smoother vapor than the vapcaps (which I use every day).Depending on the torch you use, anywhere between 4 – 10 seconds (multi-flame torches are by far the quickest).
You've tried a butane vaporizer? Which one?
I personally don't think you can purchase a safe (and effective) electric vaporizer in the price range you indicated.
Fast extraction, very good effects. Potent. Incredibly easy to use, tiny, light. All round surprisingly good for such a cheap device. I have to mention it because thereis no word out there on this one yet, when it should be getting a lot of attention.
Community- meet the Sapphire.
Ps. I wont call it a microdosing vape though. I think the bowl holds 0.2 to 0.25, and vapes it all very evenly and fairly quickly too. I expect it can work with smaller loads. But the Sapphire will appeal to heavier users who have a higher tolerance and like/need to run through a fair amount of material.