I've been reving to 8K for the last couple years on just the CFM pump. I've lucked out so far.
Dry sump is best, but plumbing and such is tougher. THe cost isn't really that great, IIRC it's under $1,000 all said and done. But again, it's added cost. Rebuilding/repairing a stock engine costs about the same. So for me it's not cost effective.