It sounds like you want a lot of travel...unless you find a stem-to-eye shock, you won't be able to use all the compression travel on a 10" 7100 without reworking the upper shock mount. If you're not getting a longer shock than the stockers, I'm gonna guess you also don't need the res...check out the 5100 series and save a few bucks for something else.
If you go to a shock hoop you get to rework the tabs on the axle...not difficult...and if you're not crawling (gonna go out on a limb and guess no) you can just mount the shocks lower on the axle and get all the travel from a 10" 7100 without a shock hoop. Chaos has a trick shock mount which looks like it will work for exactly that sort of build. Dunno how it'll sort out with one hanging forward and one back...but they are good people and surely can help you sort it out.
If you put in a shock hoop, and drop the axle mount a little...maybe you could fit an 11" shaft (that would be BBCS and it's valved as a crawler, not dune bashing). Dunno if you can fit a 12" back there without cutting the bed, ruining the shock angle or mounting the shocks really, really low on the axle...of course, if you're not crawling, and you went SUA anyway, you'll have the space...but now I'm just talking out my arse.
Tell us how you're gonna use it...desert ride, rock whip, hardcore mall-assault pimpmobile...?
-Sean