The jl flat subs look awesome, and I am sure the preformance will be there.
However, If you can't wait, or decide they will not work because of required airspace or something, I would highly reccomend the jl 6wo 6" woofers.
My friend had one in his crx, in a box that sat inside his spare, and with 100 watts it sounded very nice. It added a solid kick and filled out the lower octaves of most music very nicely. Completely concealed, but the speaker looked nice enough that you could mount it in a console exposed and it not look bad at all.
I have not heard the ED 6.5" subs, but they look solid as well.
Might also look into a company called Tang Band. Their speakers are sold on
www.partsexpress.com ,and people seem to think favorably of them. I know they have a 6.5" 5.25" and 6x9" woofer listed on parts express.