Good investment on the JL sub. I really like those.
Have you looked at the Pure Power 700 that Ken Taraszka reviewed this month in AVRev.com. Its what I use and it is in a class above the other AC power products. FULL power regeneration. COMPLETELY off the grid. Battery backup and more. Its a little expensive vs. your system but I would rather see you buy the small Pure Power than waste $400 on something that doesn't do much.
A cheaper solution is the Ultralink unit. Unlike other surge protection devices - if it gets hit - it dies INSTEAD of leaving your system compromise. This is VERY cool as you don't want your protection to be sitting there useless like most power strips do if they ever takes a hit.
I hope this helps...