Without knowing anything about your room/setup, I'd say you'll not be getting better dynamics and clarity by switching Def techs out! the 2000's are fine - but I'd add the matching center, not the 2002! (I think it's a CLR2000 you need).
Also, yes, the newer pre' pro's that are coming out with the Audyssey room correction, WILL MAKE A HUGE INPACT ON THE SOUND IN YOUR ROOM!! (MUCH MORE ACCURATE SOUND POTENTIAL). So, keep your eyes pealed.
IC's? I'd recommened the no lose Harmonic Truth Links. I swear by these for in expensive IC's. Also, the Acoustic Zen Satori speaker wires. (which look like garden hose, with brade - lol) Otherwise do some reasearch on more manageable sized cables.
As for the blueray player WHY are you waiting for one that decodes HD DD internally? It's not going to sound as good as processing inside a pre/pro! I garantee it. Look for limited dynamics, flatter sound, etc. It's always been better to process DD/DTS in a receiver or pre/pro, rather than directly from a DVD player. That's my 15 years in Audio/Video, anyway