yet another stereo upgrade question

[socalbreeze]

HI all, looking for some advise here on choices of amplifiers. I already have a HU picked out. This is what I'm currently going to to run:

Alpine CD9887 (HU)
Focal KS 13 subs (door)
Focal polyglass 4" coaxial (dash)

I cant decide which amp I should get:

JL Audio 300/4 (slash series)
Alpine PDX 4.100
Alpine PDX 4.150


I'm afraid the JL wont product enough power when I bridge channel 3+4 to power my KS13 subs. But it has the best built in crossover in its class..so I'm asking the audiophiles which one would you guys pick...much appreciated it!