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.
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".