Personally, yeah, M390 is pretty great stuff, I'd suggest going with Carpenter's steel to keep it in the USofA, they might find they will work with them to get something out that's more traditional.
And I'm with the folks here, upgrade the steel, leave the look and handle material traditional. Well, except I'd opt for a steel pivot pin verses using nickel silver pins just because they will blend in with the nickel bolsters. I know they will work and probably for a long time, but it seems odd to use that as a pivot pin to me. So my vote would be for a higher grade blade steel and steel pivot pin
G2