that will sound nice. that amp is a great match for two of those subs. I would recomend slot ported for those subs to get the most out of them. If you want to stay under $700 you have a lot of options. Do you use Ebay? If you do then your options are huge. I would look into image dynamics. Also Eclipse aluminums and Titaniums. if you have the chance to go to a local shop and hear any of these I would recomend it. The JL's will sound nice though it all depends on how much you want to do.
well if you get the w3's I would run the 500/1. amother combo that would sound very nice is going with 1 12w6v2 and the 500/1 or with 1 -12in Eclipse Titanium with the 500/1 would sound very good. It all depends on what kind of sound you are after. The w6v2 and the eclipse TI are geared toward SQL with great SQ while having the ability to get loud while sounding very nice. The w7 with the 500/1 I believe will put you over your budget. the w7 is a nice sub but expensive. I would recomend a w6v2 over the w7 because the SQ is much better but thats my opinion.