Can't comment on the Fulcrum body question, but on pre-builts I guess the tester recommendation would be R501-C30 (as they are slightly more over-built than the R501.
...and I'm guessing from your description price is a factor.
If it were me though, I would go for 36h tiagra hubs with double butted spokes to a sensible widish rim. A319 for cheap and heavy or Archtypes* for a bit less weight and prettier**.
*assuming they come in 36h
**I think they're ugly but everyone else likes them
EDIT: these look like quite a good buy given the cost and quality of the rims. Not sure on the rear spacing of the non-disc XT hubs though.
Can't comment on the Fulcrum body question, but on pre-builts I guess the tester recommendation would be R501-C30 (as they are slightly more over-built than the R501.
...and I'm guessing from your description price is a factor.
If it were me though, I would go for 36h tiagra hubs with double butted spokes to a sensible widish rim. A319 for cheap and heavy or Archtypes* for a bit less weight and prettier**.
*assuming they come in 36h
**I think they're ugly but everyone else likes them
EDIT: these look like quite a good buy given the cost and quality of the rims. Not sure on the rear spacing of the non-disc XT hubs though.