I think I fall in a fourth category: I don't like to make any modification to my CB, nor chopper not cafe style, but don't care about as-showroom condition. For me, the bikes are built to be ridden, and that's what they're gonna do, one of these days these bikes are gonna run.....ops, I'm digressing.
If I have to replace a broken or worn out part, then so be it. If I find an original part, then great. If it is so expensive or unobtainable, then let's go for a substitute. If you spend a lot of time and money in a restoration then you won't ride the bike, and though I find it worth of pride to sit back and admire your resto job, but then it's better to restore furniture.
Raul