Hey guy's sorry to resurrect an older thread...and it's my first post to boot
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Anyway, I actually own a behringer ep2500 and a qsc plx1602 and ran them head to head. I already had the 1602 on my jbl 4642a subwoofer bridged to 4ohm. But found a great deal on a ep2500 so I thought I'd give it a shot.
The behringer did seem to have a little more power/volume/impact but the qsc had a much cleaner/tighter sound. The ep2500 was a good bit more "boomy" sounding. I ended up keeping the plx1602 on the jbl and use the ep2500 on my diy dual-15" sub. Now if you just want max spl and don't care about sound quality...the Behringer amps are hard to beat for the $.
I noticed that several online retailers have the plx series on sale...I don't know for sure but they may be soon replaced by the new plx2 line. I've recently seen the plx3402 on sale for less than what I paid four years ago for plx1602. Good deals to be had on a great line of amps imo.