I think if Taigen is going to do an M1A2 it will most likely be more accurate than the Hobby Engine tank. theirs was wrong due to the hull shape for their tracks and gear boxes. Other than that it wasn't too far off and mine looks pretty good with Tamiya LEO tracks and reversed sprockets.
As far as something very special coming out i would think that if it weren't a Cromwell, Challenger or other British tank a lot of people would like to see some modern armor come out, like the Challey or M1 or T-72 or Merc.