The tightest amp for bass I've had in my system was a Bryston 2BSST. If bass control is what you're looking for this might be a brand worth exploring. They won't mellow out or make anything seem warm and fuzzy, but they sure get an iron fist control over woofers in my experience. There's a 3BST on sale here for a little more than your looking for, but ain't that always the way?
Also, you may experiment with different interconnects and speaker cables that could tighten things up as well. I once had the Zu Cable Julian speaker cables in my system, and they also damped and tightened up the bass considerably. Just another avenue to consider.
Oh, and last but certainly not least and also the least expensive option, have you experimented with speaker placement yet? The further out you get the speakers from the corners and away from the front and side walls will tend to make bass less boomy. Even if you don't plan to keep the speakers out that far into the room, it's instructive just to play around with it to see what happens.
Best of luck.
Also, you may experiment with different interconnects and speaker cables that could tighten things up as well. I once had the Zu Cable Julian speaker cables in my system, and they also damped and tightened up the bass considerably. Just another avenue to consider.
Oh, and last but certainly not least and also the least expensive option, have you experimented with speaker placement yet? The further out you get the speakers from the corners and away from the front and side walls will tend to make bass less boomy. Even if you don't plan to keep the speakers out that far into the room, it's instructive just to play around with it to see what happens.
Best of luck.