Which new river? And if your talking about the new that runs from NC, through VA, and into WV, which section (general location is okay)?
I am 230-235 lb and fish fine in the Coosa. I have not done a lot of standing up yet, no real need in fall/winter with the seat in the high position. My 6'5" buddy (only 200 lbs) has no issues in his Coosa.
Cuda will be a better choice if you sections have lots of flatwater. Coosa will do better in areas with lots of rocks to dodge.