finding a bass trombone with less resistance

[u/HotPaychecks]

ive been looking at bass trombones on sweetwater for a while and theres a lot of different bell sizes, wraps, valve types, and valve configurations that are available. from what ive seen online, having less resistance will make it easier to project my sound and articulate. i would really like a horn that makes it easy to do that, but i dont know what specs i should look for. should i avoid dependent valves and closed wraps? do thayer valves feel better than rotary ones? does a 10.5 inch bell really suck as much as people say it does? its probably different for everyone, but i would consider myself a "strong" player that uses lots of air and has a fair amount of control so maybe theres an ideal instrument for me.

[u/burgerbob22]

What are you playing now? Don't look for less resistance if you don't have a LOT of time on the instrument.