You'd be surprised what a good coil can take long term. The new gm stuff for the gen V motors are good, they basically converted to the D585 coil universally. It's a good coil, way better than the standard LS. They all convert to it.
To run a smart coil you need a harness like BL. The reason you don't see a BL kit with gen V coils or D585 is because they are more expensive than the R8 and require wires, mounts, etc etc adding to cost, so margins would be lower if you wanted to keep costs down. Ask how I know lol, the PR is a steal imo lol. The R8 puts out just fine and is cheap, even if you need to treat it as a maintenance item unlike the others so pick your poison... I think BL chose wisely. If you're worried about "best" coil then you better pony up and/or expect a more complex setup.