I could be wrong, but it seems like you really only have one option which is 150x2@4ohms. You don't want to run them at 600x2 and since you only have 1 pair, you're not going to get down to 2-ohm load. They should sound good at 150 a piece. 200W is the recommended RMS rating, but I've done a a lot of reading on it and talked with folks who think they sound great with 150. Post back when you get it hooked up and let us know how they sound. Mine come tomorrow and I can't wait.
2003 X-2 MCX