After the upgrade I did on my Lionel Southern 4501 Mikado, I've found it more fun and less expensive to buy older locomotives at bargain prices that I could upgrade to Command Control. For me, it's just economically better than spending high dollar and creating a bigger carbon footprint for a new Legacy/Proto3 engine, especially when I'm a middle class college student.
The next project will probably be the MTH Empire State Express Hudson from 1995.
Though I want to ask, did this specific engine come with the older Seuthe smoke unit or the MTH fan driven smoke unit?
If it's the latter, it would make upgrades like the Super Chuffer much easier to add on.