component system rms wattage?

I've got Morel Dotech Ovation 6 components on 2 channels of a PDX-4.150 running off the stock Scion radio and it sounds great (to my uneducated ears) with no deadening in the doors or anything.  I was originally going to run a RF 360.2, but then the CD7200 came out.  Of course the half-fiberglass box build, wiring, and the sudden availability of some color-matched headlights and taillights blew my car budget, so I'm waiting impatiently for someone to drop a load of cash in my lap.