Are you using CM10 Rom on CDMA with Big Red or GSM on other carrier with unlocked Sim? Not sure what you are looking for in terms of "fast" as it is a tradeoff with stability & battery life, etc. and the design/OS is almost 3 years old.
ICS & JB Roms built attempts were experimental with varying success, and almost all developers have moved on to newer hardware & devices, and, most of the links are dead or no longer housing the downloads. AndyBone's stock is good & you can uninstall un-needed Apps easily since you are S-OFF.
GB and Sense-based Roms, including modified stock ones adopted for GSM use are your best bet for using this device going foward - with newer Apps released, you wil find support to be a challenge here on XDA unless you stick with one of the few proven Rom & stable Apps that won't upgrade to newer verisons and then FC'd on you or become sluggish.
We still used the DI2, unlocked & rooted for GSM duties, mainly for voice calling & very light browsing - no FB/Hangout or other newer Apps that's memory hungry. If and ONLY if you are using it for GSM service, do try "Android Revolution HD 5.3 - it's based on 4.0.4 and relatively stable, good battery life and not sluggish with a clean install (full wipe/reset, etc.) http://forum.xda-developers.com/show....php?t=2291476
- as always, backup and know what you are doing, including use of ADB and terminal commands, etc.