Amp newbie needs help

So, I found a great deal on a Focal 826S package (fronts, rears, sub and CC). I plan on running it with my Pioneer Elite VSX-81TXV and potentially a hand me down Hafler 220. A good friend of mine suggests upgrading the receiver and not worrying about an amp, for now. I don't have a problem with my receiver and would like to upgrade the amp. I'm not looking to spend more than $800 or so (I know it's not alot - but it's what I can afford). Any suggestions out there for what I've got going?

Any help is appreciated...

Thanks