Straight, beaker, different kinds of percs, anything else? If you weren't too worried about the price what would you add? What high end brands do you like? I've heard many good things about Mobius, some good stuff about Sovereignty, and that Roor is good but just overpriced. I'd be open to other brand and feature suggestions, though, I'm just starting research.
I have a movius, really good bong. I wouldn't buy a roor personally, as you said, overpriced for its performance.
I have a sovereignty downgridded stemline. I absolutely love the function, however I worked my way up to a piece like that. I wouldn't advise dropping a bunch of money until you figure out what you like. For example, the sov stemline that I own comes with either upfacing grids or downfacing grids. If you were to poll this forum I would be willing to bet 90% of the people would tell you that the upgrid is better.....but after trying both I prefered the chug of the downgrid over the lighter pull and stacking bubbles of the upgrid. There was no comparison to me. Had I went with what everyone told me, that would have been close to a $400 mistake on my part. To answer your question, you can't really go wrong with brands like Mobius, Sov, SGW, 4.0, Dave Goldstein, toro, SYN, ect...so long as you get a general idea of what you are going to like. My suggestion to everyone is to always just grab a lower price, well made straight tube until you get to try some things out....hell, you might even decide that that is all you need. Then you can always just drop another $30-40 on a gridded downstem and have a full functioning piece with a bunch of money left over for material.
I'm diggin Jm flow, he's the reason that pillar perks exist, my inline to sprinkler is a beast piece!
Stemless, no more than one perc, and no more than 13 inches or so tall. I love my SYN mini shower head. It has everything I want. It's a great balance between flavor and diffusion.
12" to 14" high Straight Tube No ice pinches, perks or anything in the bore but the down stem. Broad base Glass no thinner then 5mm Priced at no more then $200.00 US No sandblasting, paint or stickers. Bore size around 50mm to 55mm. Off the top of my head that is what I would like. EDIT: and for the bong to have an air bag, parachute and a forcefield.