I had a savage and a T-Maxx at the same time a few years ago. Now back then I wasn't into customization and upgrades that much, I was just looking to burn some money and enjoyed them in their stock form. I liked both trucks, the T-Maxx I bought RTR and I built the savage SS from a kit.
Now to the point, I got out of RC's for a few years, and recently got back in but now I'm into bashing more and not building shelf queens (yet) as I did before. So when I got back in, I bought a T-Maxx. I think that says a lot. Many people may disagree, but I like the way the T-Maxx handles and drives (especially since you're getting the 3.3, I'm sure that you'll love it) I also like the aftermaket support that the T-Maxx has, but the savage has a lot of support as well.
I hope this helps a lil bit, but I'm not a veteran with the trucks like many people on here, so they can tell you better. I do know however that the 3.3 offers a whole lot more power and torque than the stock 2.5, almost like 2 differnent trucks.