Sorry, I've never messed with the Mock 460 (nor do I really care to), so I can't give you too much info, but I thought at the least I'd bump this for ya.
Personally, I would leave the tweeters out of the equation, and just worry about amping the subs. That said, you could use just about any amp that will give out the power. If you wanted to stay with Rockford, they make amps that would work, as would most good mainstream companies out there.
Again, as for the Mock 460 stuff, I don't know what to tell ya..