New rims/tires might help... offset, but that will run you decent money as well (rims @ $12*2 + tires @ $22*2 = $68). That will also put a lot of extra stress on the already labored axle bearings of a t-maxx in my honest opinion.
I'd try dropping the ride height a bit, adding a bit stiffer spring and heavier oil. Not sure what stock is, but if it's 30, go up to 40-45. If it's 40, go up to 50.
Keep in mind though, those plastic shock bodies can't take a lot of punishment. Once you put on heavier springs and thicker oil (to keep the heavier springs from being bouncy), you will start blowing the caps off and splitting the shock cylinders if you hit any decent jumps. Been there... sucks.
If you do decide to get some better shocks to handle thicker oil/stiffer springs, get the traxxas big bores. $60 and they are built really well. Probably some of the best drop in upgrade shocks you can get your hands on. $60 isn't bad either considering there is 8 of them.
If your not a big jumper, you can actually just buy some shock o-rings and put limiters inside the shocks under the disk so they don't extend as far. You'd be surprised what shaving 4-5mm off your shock extension would do to body roll and handling in the corners. Try it on 2 in the front and two in the back. If you don't like it, then you only have to fix 4. If you do like it, do the remaining 4 to avoid off angle stress on the shock parts. You would need a few of these sets though to try:
http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXJJ17&P=SM
Or go to your local hardware store and see if they sell any little o-rings. I'm not sure how normal rubber will hold up to silicone oil though... might be ok.
I tried going the lazy route once and use fuel line, but it split then messed up the shocks when it was floating around in the oil.