Replace my reciever acting as a pre with???

I recently purchased an Oddyssey Stratos amp and paired with a Yamaha RX-V2200 receiver serving as the pre. I've decided I can do without my center channel/suedo-surround system. For the short-term, I'm looking for an inexpensive pre-amp to replace the receiver duties until funds permit me to go with a tube pre. If I dump the receiver I loose the tuner feature, which the better half will frown upon. I've seen manufacturers like Adcom, Anthem, NAD, B&K, etc that have the tuner integrated with the pre-amp.

My question is, will I get significantly better sound stage and added warmth with one of these pre-amp/tuners than my current 2yr old Yamaha receiver? If so, what model would you recommend? Budget is around $300 used and I prefer a remote.

Thanx!