Since you're going to go through the trouble of removing the head to replace the gasket, by all means, spend a couple hundred dollars more and have the head sent out and checked for straightness and honed, new valve guides and valve seals.

__________________
Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".