The T34 was an excellent tank, no doubt; however, the US M26 that was just trickling on board at the end of the war was superior, as was later demonstrated by M26 - T34 engagements in Korea.
That said, I agree with everything else in your post. Our going after the Soviets at the end of hostilities would not have been supported by the American public, largely due to sympathetic parties in FDR and HST's administrations, to say nothing of the depth of their penetration of US and British intelligence services.
The T-34-85 was a better tank than the Sherman, which made up the bulk of our armored forces. It existed in overwhelming numbers.
But the Soviets had also developed heavy tanks, specifically the IS-2. This had a 122mm gun and could crack open King Tigers at over 1000 meters. The Soviets were also introducing the IS-3 Stalin tanks with the same gun and better armor.
The primary failing of their AFVs was their ergonomics and quality control (and lack of radios, and targeting optics and...). But the Soviets had more tanks, and better ones.