I'll toss this in for what it's worth: a dogi/dobok you really like is well worth whatever you pay for it, since you'll get years of wear from it. Find out from your instructor if you can special order what you want, and get it.
I'm not sure I understand the stricture against multiple uniforms - I've almost always owned at least two, so I'd have a backup in case I didn't get mine washed in time. As an instructor at my instructor's school, I used to have different uniforms for hot and cold weather, since I often didn't get to move enough to warm up sufficiently when it was cold. I don't have that issue now, and I just prefer the heavier dogi, anyway.