stikpusher
Tamiya makes a few kits in 1/25 of Post WWII AFVs
Centurion
http://www.tamiyausa.com/product/item.php?product-id=30614
Chieftan
http://www.tamiyausa.com/product/item.php?product-id=30608
T-34/85 (yes it's WWII but had a long post war combat career as well)
http://www.tamiyausa.com/product/item.php?product-id=89569
and SU-100
http://www.tamiyausa.com/product/item.php?product-id=25104
They also make a Tiger in 1/25
http://www.tamiyausa.com/product/item.php?product-id=30611
The Tiger and Centurion are both supposed to be nice well detailed kits with interiors, even if they are old.
Personally I think the Chieftan would be pretty sweet...
I was unaware, until last November, that the Tamiya ( and Academy ) 1/25th scale kits had been re-released a year or two ago.
I'm now playing catch up and , unfortunately, my budget did not permit buying until this month ( sure regret missing the Black Friday sales 
) .
I probably purchased the last Tamiya 1/25 Tiger I kit on the North American continent and am currently awaiting delivery.
While a Tamiya 1/25 T-34 may be my next tank purchase, I was thinking mostly of armored vehicles introduced since the mid 1970s such as the Merkava ,Leopard 2 and M1A Abrams.
The Abrams and Leopard are available as 1/24th RC at roughly $150, but the fact that I would be gutting them
by removing the electronics and motors makes the price less palatable.
I used to do a lot of armor scratch building in 1/76th scale during the 1970s so I know what I would be up against.
I also have a small lathe (5x12 ) for turning road wheels and barrels so the major barrier is now access to decent drawings.
Rob, thanks for the George Bradford's drawings link; I'll sift through it for vehicle drawings.
The drawings don't need to be 1/25th, only large enough to show good detail.
I can enlarge prints to 1/25th.