Natchez.Com has F10KGDISC604C which is a Knight Disc Rifle and with the rebate you can get it for $179.95. I really do not think you could get a better shooting rifle for that kind of money. Knight shoots sabots excellent. If you decide to go with them, get yourself some Barnes Expanders in 250 grain. My Knight shoots them excellent.
Actually if the break open design was not all that important, and your willing to spend the extra time to clean the bolt on the Knight rifle, I think you're going to be real happy with the Knight.
You need to look through the Natchez October flyer, they have some excellent sales on rifles...