Search for "SpoCalc". It's a .xls (spreadsheet) file with most rim and hub combinations available. I have a link at home for another web-based program that a BF member created based on info from various calculators. I still find SpoCalc easier to use but the web-based program has more rim and hub info. You might be able to find it by searching or I can post the link when I get home. SpoCalc could use an update.

If Sheldon, Schwalbe, and Sun all agree that your tire and rim combinations will work, I'd feel pretty secure with the choice.