@John Sethian Thanks, You gave a lot of information I don't think I knew. I didn't really know you could run TMCC/Legacy in 2 rail, but I guess it makes sense...if the drive gear is 2 rail, then it can be controlled by TMCC. I have seen some Atlas 2 rail locos that said TMCC, but didn't really know that's what it was.
I have one Atlas Diesel GP35 SAV&ATL that I want to keep, so I would love to convert to 2 rail, but I "assumed" I would put DCC in...and I probably will. I could sell my Legacy 990 for decent money which will help pay for the new DCC system... (If I completely come over). I am hoping I can test drive a DCC system or 2 this weekend before buying one.
Part of what I really like about DCC are the sounds...I am not a huge fan of crew talk in Lionel/MTH locos, but love the sounds from the ESU sound decoders.
Tonight I have been watching video and reading about converting MTH freight cars to scale wheels and Kadee couplers...pretty easy it seems since the premier line has the mounting points. I bought my first 2 rail freight car on ebay the other night. It will arrive Monday/Tuesday.