Need advice on system

Hi, I'm seeking advice on equipment as I'm considering replacing my system with Dolby Digital equipment. I'm presently using Yamaha Dolby Prologic receiver (85 watt front, 25 watt rear), Polk Audio speakers (model main, center, rear), and Klipsch powered sub. My questions are: 1. Should I go for Yamaha Rx-995 or Sony DA50ES receiver? I heard some horror story about Sony's remote draining batteries. 2. Should I replace my speakers (not the sub)? If so which would you recommend for approx. $800-$1200 (include center and rears). I'm particularly interested in cherry finish. Also is it better off to purchase used speakers and get better ones with my budget? 3. Which DVD player should I buy (about $500), preferably the one that can play CD-R, as I have some copied CDs that I like. Thank you for your kind advises.