Replace MCW50 with 1/2ID GPU block?

Gotta fix a kink in a hose soon and figured i'd replace all tubing with 1/2ID. The whole system is 1/2ID fitting except for my GPU block. It it worth replacing this thing to have a tru 1/2ID full system or get the silly adaptors? Been a while since i been looking for a GPU but i recall there being a nice all copper one that was 1/2ID. I'm also looking at getting a new vid card in the coming months (x800xl most likely), not sure if that will be a big factor.

Keep the MCW50? or move on and go big?

If you can get 1/2 fitting for it, id say keep it. Otherwise, maybe look at a DD Maze 4.