As it is a Profile product you'll likely not get quite rated output. In my personal experience the Profiles have proven pretty reliable, though, so that's certainly something to consider.
The Clarus 1200 is in Crutchfield's archives now so I can't get a bead on about what they sold for retail...a quick search on eBay showed two cl1200 units sold in the last 30 days at a BIN price of $109 with $35 for shipping.
If you could get the used one in the classifieds for $100-$120/shipped I wouldn't call it a bad deal.
Well what would you guess it put out? I currently am running the JBL BP600.1, would the Profile be an upgrade or should I just wait until I have some more cash?
Lots of problems with the bx1500d. Not so good of a choice and over rated at that hints the reason I got rid of my pair AGES ago. I will say the profile should show you a solid 750-800watts.