Walt,

I have to agree with Sushi that you should order a sub next. I own the M22's (along with the VP150, QS8's and a sub), and you really need a sub to help the M22's with the low end. The M22's have nice tight bass, but when you add a sub into the mix, the sound just fills in so much better and the M22's really come to life.

You can run a phantom center until you get the VP150, so that could probably be last in the purchases. The QS8's will add quite a bit to your system as well, so I would purchase those after the sub. Good luck.