If you are looking to maintain the stock radio and upgrade speakers i would suggest something along the lines of FOCAL Access series componets if you are looking for a good clean speaker that will work well with stock head but leave you room to grow

 

i went with the memphis 15-PRCS6 component set. heard really good things about em, and i ended up getting them for a little cheaper than the alpine set. f in steaL.

 

Well, if you're considering JL, I'd have to suggest the eDi 6500s. My roommate has JL XR's in his van, used my eDi's for a couple weeks before I got them installed and was threatening to just steal them from me. Everyone that listened to them in his van agreed, the eDi's sounded better.

And yes...I work for eD...but this was last year, before I did, and I've been making the same suggestion since then.