prolly don't need a shock. don't know why you'd need disc brakes. I guess they're better but doesn't sound like you need that. plus I've read they need maintenance & sometimes interfere with accessories. as for ordering a bike that is not in stock. I would not cuz I've read so many buyers remorse stories. I would hate to return a bike that a store had to order just for me. would rather get something I can sit on, ride, have them adjust & modify (bars, saddle & stem) & test ride BEFORE I buy it. are you stuck w just 1 bike shop?

cpl ideas
- any bike rental places near you to gain some experience with what you like & maybe don't like?
- any craigslist bikes in your area you can check out. do a little test riding like that too. you can look at a bike without buying it. just be honest that you may not buy it, just want to look at it. but you might be surprised & really like something. can wind up saving you some big money. after a cpl years you can then buy new if necessary

where approx are you located?