Wow, that's the first I have heard of recommending against JL!! Perhaps it's because of the price-to-power ratio difference. Well, I'm basing my call on what we sell at the store: JL, Kicker, Kenwood, Alpine, & Pioneer. RF & MTX used to be better, but that's not saying that they aren't good now. If you can get your hands on an old Xtant 1001dx, rectangular-shape only, that would be nice, or even the 601.
We haven't had any bad amps coming back, but rather blown subs; had a JL 500/1 pushing 2 12" Kicker L5s, and one of them was blown. Of course, it could've been user abuse, but the amp never gave up. I nstalled a Kicker 400.1 with 2 10" Comp VRs, and no problems either. It will come down to how much you want to spend. Of course, having another JL will nicely match the 500/5 if you ever put them side-by-side.
You do pay a higher price for products like JL, Kicker, Alpine, etc., and our store isn't out to start a price war with BB or CC, thus, we don't necessarily carry the brand, or line, that they do.