Unlimited convection in a desktop is pretty much unrivaled, I will say though.
I stick to the VapeXhale Evo ($300ish but discontinued) and the Tiny Might 2 ($350) myself, but I used e-nails for concentrates and I've used the Cannabis Hardware setups and they are pretty much the best way to inhale a bong rip and get as much vapor as you want.
Plus, with the right one (and only a measly investment of... nearly $650...) it is basically a one-time set-up never need to clean (sans bong) the vape/rubies/PID controller itself never needs to be clean, just kept free of flammables.
For the price range you're looking at pretty much the new Volcanos, or a full fledged Cannabis Hardware flower+concentrate in one rig, and having a Volcano for cheap I would far prefer the ball vaporizer. I just have enough vapes to justify not needing it, and even though I want to say the open heating element too, but they actually make one that keeps it covered.