I haven't played around with the T30's since I only use rack mounts (have a rack, so why clutter up the floor) so I can't say if they're upgradeable with respect to processor. Spec says the only Xeon it was ever offered with is the E3-1225v5, which is actually quite slower than the E3-1280v2 and doesn't support hyperthreading.
Maybe one of the other guys who knows these boxes better can opine on whether the T30 can handle a higher v5 than the 1225. If so, and you're willing to spend the $$ on the replacement processor (for example, cheapest E3-1240 v5 on fleabay I found is about $300), I'd go that route instead of the R210 II