I still have the following, and have abandoned plans to upgrade them to TMCC or DCS. They are all good runners, and for the most part, I just turn them loose on the layout and watch them run.
1) C&O Hudson
2) #80 Coal Turbine
3) #5 Gas Turbine
4) M1 Chessie Coal Turbine (had converted it to TMCC, but found the changes did not improve anything, so I'm converting it back to the original PS1, and will use the TMCC boards for something else).
r0d