I'm the one with the LBS horror stories.

Granted, the bikes cables may have stretched, but both brakes and wheels out of true at less than 100 miles?

I do think you should give the first LBS a chance to make it right. But I would be very stern (oh yeah, that really worked for me!) and let them know you are serious about having the bike fixed correctly. Talk to the owner of the shop, if possible (or if you can find him...did I say that out loud?)

My tale of woe ended up going to another LBS. Cycling is an inherently dangerous sport and I really want my ride to be dependable.