Help me build my 360!

I've decided to not try to cut too many corners on the bottom end. To make a good foundation for the engine will pay off in the end. I figured I might as well get a new crank, since I am getting new rods anyway, and they are only an extra $250. I thought I might as well get a whole rotating assembly. I found these. They include all the rings, crank, bearings, rods, etc. Plus, they are internally balanced. Plus, they are all balanced as a package. The machine shop was going to charge me $210 to balance my assembly, so I don't need to pay for that. I need a new damper anyway, so I could buy a neutral balanced one, and now I don't need to buy a B&M flex plate. However, I would like an informed opinion on something like this.

One other thing, one of the sets is for a 4.00" stroke. It is only $230 more than the 3.58" stroke. Seems pretty reasonable for 40+ more cubes. Plus it has forged pistons. I called SCAT yesterday to make sure it is an internally balanced set, and he said that it is. Use a neutral damper and flex plate.

Anyway, these are them

3.58 stroke, comes with the KB107 pistons $1,114

http://store.summitracing.com/partdetail.asp?part=SCA-1-98101BI&autoview=sku

4.00 stroke, $1,345

http://store.summitracing.com/partdetail.asp?part=SCA-1-98112BI&autoview=sku

Has anybody used one of these?

Are there any potential problems or issues going with the 4.00" stroke kit?

Thanks!