Wiring new stereo sv211

Finally received my Rubicons and now I have a few questions for all you stereo kings.
I am using the factory HU and Polk interior speakers.

The subwoofer is a Kicker Solo Baric L5 10". Powered by a ZX300.1 Rated at 356

I was thinking about A zx550.2 for the pair of Rubicon 350's with a in line volume control. Or would you go with a 4 channel amp?

Here is the tricky part for me, I also have a single Rubicon 250 that I think should run on the amp that is powering the interior cabin speakers. Was think about either a zx850.4 kicker or a zx650.4. Reason behind this is so I can control the volume of the 350's without turning down the single 250.

I would also wire the bow speakers directly from the HU unit. Am I thinking correctly on how to separate the two types of tower speakers or not? If I am how would you wire the 4 cabin speakers and single Rubicon 250 to the same amp?

Greg,
I have a zx400.1 pushing my Kicker L5 12 solabaric, I have a Kicker sx900.4 pushing with two channels pushing my Skylon Deafcon III's, and the other two channels pushing my four main cabin Kicker ks60's. The two Ks60's in the bow are pushed by the head unit. This setup sounds unbelievablel. I had a kicker kx850.4 that i used to use, i changed it out with a sx900.4 for this past weekend and you would not believe the difference. The sx900.4 was around 500 off of ebay but the 32dsp programming is sick. as for the extra rubicon i would look at a zx700.5 possibly.