I'd go 2.25" all the way back, 2 resonators (ie: THRUSH Magnums), and 2 straight through mufflers.
I have a Magnaflow Tru-X pipe I could sell if you'd be interested. It would be good to have the banks connected in an H or X pipe config, rather than just a true dual setup, especially with your headers.
When I first got my exhaust done it was a true dual setup where the banks were both separate, I felt a HUGE loss in low end torque, and overall power.
The Magnaflow X-pipe quiets the exhaust down SIGNIFICANTLY too.