The 'Armata'. Looks fancier than the Abrams, and has nice features. Separated magazine to prevent jack-in-the boxes, autoloader, remote controlled gatling and AT rifles, and chaff. Also pretty low profile; if it can pick up decent speed and has adequate air cover, it'd be hell on wheels.

BONUS:
The PAK-TA is the upcoming heavy-lift craft, and it's got a clever design: Powerful jet for cruising & electric power generation, and electric turbofans for manuvering and extra thrust to get out of ground effect. Certainly less complicated than most vectored thrust systems, and gives you the best of both jet speed and turbofan manuvering. Sounds like it would be a fun thing to fly, supposing it gets off the drawing board.

BONUS II: Check this out about the PAK-FA:

The available evidence demonstrates at this time that a mature production PAK-FA design has the potential to compete with the F-22A Raptor in VLO performance from key aspects, and will outperform the F-22A Raptor aerodynamically and kinematically. Therefore, from a technological strategy perspective, the PAK-FA renders all legacy US fighter aircraft, and the F-35 Lightning II Joint Strike Fighter, strategically irrelevant and non-viable after the PAK-FA achieves IOC in 2015.

Detailed strategic analysis indicates that the only viable strategic survival strategy now remaining for the United States is to terminate the Joint Strike Fighter program immediately, redirect freed funding to further develop the F-22 Raptor, and employ variants of the F-22 aircraft as the primary fighter aircraft for all United States and Allied TACAIR needs.

The Russkies have been busy. I gotta say, Uncle Sucker is cruisin' for a Bruisin.