Thanks for the helpful replies guys.
What I meant is that I just bought the Infinity speakers, and I'm waiting for them to arrive. I've had the 918 for a little less than a year, and had hoped to keep it in place, because my wife is already going to be a bit...ummm...let's say *tweeked* when the speakers start arriving next week, and a new receiver on top of that may be a bit too much. However, I HAVE had my eye on an Onkyo SR806, and right now Crutchfield has them at $679. It has a few more features than my 918, and I know I could biamp the fronts with that, but, it doesn't seem to have a power outlet for a sub on it's back panel.
All I really want to do is make sure the new speakers sound as crisp and clean as possible. For now, I may just have to see how the little Pioneer handles them, and maybe hope that it will bite the dust soon, so I can justify getting something better.
Now, if I can just find a decent SACD player for cheap...