I've been running a SR/Savage, on the TT Saturday tour, and he's been a blast. Mid-30s, with only common IOs and the Tanker ATO procs (and a few uniques, for good measure). He's really tanky and does a $hit-ton of damage, to boot. I've never run SR on a tank, so just leveling with every power and trying everything out. For that matter, haven't run SR on anything but a scrap, on live, pre IO system, before...so am certainly no expert.
Have fun and, as David Lee Roth famously said..."tell us how you do!"