upgradeable processor w/ powered speakers HT setup

i am a two channel guy but i want to have a HT set-up that's decent and won't be out of date within a couple of years. So my thought is to buy the Acoustic Energy little Aego 5 speaker HT setup. Since from what I understand the processor AE will offer with the Aego will not have the latest technology (e.g. PL II), I was thinking about not getting the AE processor but instead getting a processor that does offer PL II, etc., and that will be upgradeable.

Given that the speakers will be relatively cheap (i'm going to match them with an old Genesis sub that's not being used right now), I'm trying to figure out what processor to get. I don't want to spend a lot of money right now. Is there something out there that would fit the bill? Should I consider getting a processor that I can build a better HT system around when I'm ready to upgrade the speakers, etc.?

Thanks for the help.

Gregg