You should be able to get a Lionel 2026 on e-bay at a reasonable price.  I have three plus a 2036 and a prewar 1668.  I have to keep them clean inside and out to run great, so maintenance is regular.  You can run almost anything on 027 that has 6 drivers.  If you get 8 drivers you need "O"  If you are going to have a lot of trains you should get "Greenberg's Repair and Operating Manual.  It has helped me a LOT!