I'm using 919's & a one inch spacer, but I typically carry 150-200 lb of extra crap around...
Tools, scuba tank for trail air, full size spare, spare parts, etc...it all adds up.
IMO, 912's with a 1" spacer would be about right for 33's, unless you carry a similar load, then I'd leave the 2" spacer in, or go with 919's & a 1" spacer.
If you do decide to use a 1" spacer, I would be interested in buying the 2"'ers from you...