I'd suggest going with whatever is comfortable and practical, making sure you leave the minimum recommended amount of riser inside the support tube... You can always order a different handlebar set, or try the new "non-superman" mod that RANS has come out with that lets you adjust grip angle, etc.
http://www.ransbikes.com/ITR63.htm And, hey, if you want to put 2" tires on the bike, just DO it... it's your bike!!! Flats while commuting are a BAD thing... Get a second set of wheels, so you can swap out depending upon what type of riding you're going out for... That's what I've done with my SXP, since it's my "all purpose" bike -- I put 1.25" or wider tires on the stock Alex DA16 rims with an 11-34 cassete to use for trails, etc., and 1" on the Velocity Thracians with an 11-32 when faster/longer rides are happening...
Granted, that gives you an additional cassette to worry about replacing, depending upon chain wear...