I recommend Alpine type R 6x9s. They were only about $90 shipped on eBay last time I Checked. They have a pretty high sensitivity rating so you can get away with a good aftermarket deck if your not planning on running an amp to them.
That's a great and powerful amp and deserves some really nice 6x9's! If you go with JL at least get the VR690. Or some hertz high energy. Image Dynamics makes some top of the line 6x9 components. Also I installed some MB quart 6x9 components in my brothers car to a JL 300/2 and was really impressed!
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