Yeah, no rush buddy. Take your time, listen with your OWN amp (once it returns), and then write the review. The wait will be worth it, at least for me.
I'm not sure how much difference I might hear between the amps since my amp, a Parasound Classic 5250, is from the same line as the loaner, a Parasound Classic 2125. The primary differences between the two amps are the number of channels (mine is 5 channels and the loaner is 2 channels) and the power ratings (mine is 250 wpc @ 8 ohms and the loaner is 125 wpc @ 8 ohms).
That said, perhaps I'll take your advice and hold off until my amp is returned.
BTW, over the weekend while my system was silent I resorted to using a portable speaker system like this hooked up to a MP3 player.
I was really roughing it!