Thinking of upgrading from a 7.4 to a 8.1 Gasser

For what's it's worth. I just sold my 1999 454 Burb and now have a 2005 2500HD with the 6.0. It doesn't have the grunt of the line that the 454 had, but a major difference at highway speed. Better mpg too. 8.1's are hard to find in the trucks but more common (it seems) in the Burbs.
So far I'm not regretting getting the 6.0.

Most people with 8.1's will be burried with them !