+1 You can always add an XPA-2 later if you feel something is lacking. If you use your system for mainly HT, the XPA-5 should suit your needs just fine. I had an XPA-2, and I ended up selling it and have an XPA-5 coming as soon as they are back in stock in a week or two. It's definately the less expensive solution. If cost is an issue, you could look into the UPA-5 also. You speakers are very efficient, and it would probably do the job too.