I have had my Pioneer 811 since June of 2002 and the only change since then really has been the addition of DPL IIx this year feature wise.
The key thing is to not think about what might come out next but what features do you want now....DD, DTS, DPL II, types of inputs do you need. Look for that in a receiver..then compare a few and buy the one that appeals to you the most...