If you buy a tarp and net from the same manufacturer, they will be designed to fit with each other properly. Unless, of course, if you get a giant 2-3person net and a small 1 person tarp! Or try to use an A-frame bug net with a pyramid tarp.
Not to dodge the question, but pretty much everything from those companies are "approved" of here. You'll just find variations in dimensions and weight.
MLD arguably has the highest quality stuff. John from Bear Paw will do custom stuff, and is a nice guy. I've never ordered from Yama, but I'm eyeballing the Stratiform III tarp myself. Oh yeah, and HMG Gear. Forgot about those guys. I've got one of their ECHO 1 systems. Very nice product.
The whole droopy bug net thing is disappearing, unless you badly mismatch the parts.
I think the best thing, instead of going through all the permutations here, is to find a tarp that YOU like and then ask for suggestions on an inner. Or find a combo that you like, and ask about it here.
Two common pairings:
MLD DuoMid with MLD Solo Inner net
Any flat tarp with the MLD Bug Bivy