Not trying to start a flame war, but you can do MUCH better than JL Audio amps for the same or lesser money. Their amps are quality, but the price is inflated grossly because of the name.
I'd suggest you get rid of the 4x6's first. Then if the 6.5's aren't a component set, get yourself a nice 6.5 comp set. The Phoenix Gold RSD's are 87.00 shipped (US) on Ebay. For the money, they simply can't be beat. Then, for the amp, you have a few choices.
If you absolutely want the best, check out US Amps, Zapco, McIntosh, or even Mmats. They aren't cheap, but they are regarded as the best amps out there. I may have forgotten a few, but those 4 manufacturers are much better than JL in my opinion.
If you want to spend a bit less, and still get the same quality as JL, if not better, check out Memphis or even Soundstream. Great amps and the prices aren't through the roof like JL.
For a budget ended solution, you can always check out Hifonics or Cadence.
Myself, I am looking at a couple of Cadence amps. The TXA line is phenomenal for price to performance and that's my cup of tea. If I had more money to spend, I'd go with either Memphis or Zapco most likely.
For your setup, you could get by with even just 1 amp. If you go with a 5-channel amp, check out the Memphis 600MCH 1300MCH. The 600 does 55x4 (4ohms), 400x1 (1ohm) and the 1300 does 75x4 (4ohms), 1100x1 (1ohm). It's a phenomenal amp because you can run any it 4+1 channel and the amp channel is a dedicated D class amp. Also, the sub channel does 1ohm stable depending on your subs voice coils and ohm rating. Here's a link.