I currently have a solid roller (244/248,.575/.575) 4.11's, rpm heads, headers, 11 to 1, 3600 stall. I want to be more streetable... getting tired of noise.

Would anyone recommend the Extreme energy 268?
I want to use about a 2000 stall converter.

Can anyone steer me in the right direction?

How about a hyd roller?

Something around 225-230° @ .050" will act a little milder than your solid, not a whole lot, but some; and won't cost too much power. Your solid will sell easy if it's in good shape, especially if it's a small base circle.

Look at stuff like a Comp XR276, or similar grinds from Lunati, Crower, etc.

What`s the application?
FWIW...all rollers are small base circle, some just smaller than others.