What SUB?

Ok, I currently have 2 10" American Bass XL-10 Subs and a Jensen 600 (the box says 200x2 RMS) Watt Amp, Rockford 1F Cap, Sony 6.5 (Rear) and Pioneer 6.5 (Front) in my Accord. I was looking to get a new Amp and a new set of subs so better sound and for something that is going to Hit pretty hard. I was looking at getting a Lanzar Vibe250 Amp (2x250 RMS, 2x500 Max Bridgeable Amp) and for some subs, I was looking into either ONE Blaupunkt ODwa1200 (Aluminum Cone 12", 400 RMS 1200 Max), ONE Blaupunkt ODwa1500 (Aluminum Cone 15", 500 RMS 1200 Max), TWO Blaupunkt PCwi1200 (Graphite Injected 12", 200 RMS 600 Max), or a pair of JL10w3's? I have heard nothing but good things about Blaupunkt Subs. Are they as good as they say they are? What should I go with? I know that the JL's really need a lot of power, and I dont want to push much more than 500 RMS. WHAT WILL HIT THE BEST FOR ABOUT 400/500 WATTS RMS?

-2 12" 200 RMS
-1 12" 400 RMS
-1 15" 500 RMS

What about the Amp? Is the Lanzar Vibe250 a pretty good amp? Better choice than my Jensen?

Any other info is welcome!
Thanks!

Diamond Audio M6 12 will use that power. And take more.