I just put Rev 10's on my boat this past weekend. I can tell you, these things are worth the price even if they cost double what they sell for now. I went from 4 6.5" coaxials on my tower to a single pair of REV10s on a Syn4 amp. The volume they produce is just unbelievable. When I tuned mine, I couldn't even turn them up to the point of distortion, because not only did I never hear any, but it was too loud to put my head in front of those speakers to listen for it. The sound these produce is unlike anything I've ever heard. Loud at all volumes as well as incredibly clean, crisp, and pretty good bass response too for a tower speaker.
If you're debating it, just do it. Had a thread over on teamtalk that helped me through my decision process if you want to look at it:
http://www.mastercraft.com/teamtalk/...ad.php?t=67885