I'll be adding a HTPC in the next few months for sure. And I might buy some SVC subs, just for fun..because the price is right.
Other than that, probably not too much.
The next big thing to upgrade would be the receiver. I would like to go to seperates and replace my current Yamaha DSP A1, but I'm looking at going higher end, like McIntosh and probably will not do it this year.