Why does that surprise you? To me, $50 is where the amount becomes significant. If I'm comparing two similar subs and one is $10 more than the other, I'd probably just flip a coin, or go with whichever looked better. However, if one sub is $600 and the other is $650, I'm probably going to lean toward the $600 sub; all things being equal.
Wow. A thread started by a girl that says she knows nothing about stereo's has gotten to 5 pages! Good first post J.