D600 and 2 JLw3v2-d4?

This is the first system I have ever built. It is in a 91 BMW 525i (black on black). I bought 2 JL w3v2 four ohm subs, prior to that I was only planning to have one sub so got a directed 600D (mono 200rms @ 4 ohms not 1 ohm stable). I am debating if i should get a different one or stick with it, my over all goal is to have a very clean sounding system not drowning with bass but complete. Does 200watts seem like a good RMS for those 2 or should I get something bigger? I have a sealed box that is roughly 1.6 cu ft.

Thanks for any help
TWR