Hi, I'm new to this. I had the old Lionel in the 50's when I was a kid and HO in the 70's. Now I want to get back into trains with o gauge. I'm going to build a layout around the walls of a finished room in the basement. I've been looking at Lionel and MTH steam engines. The middle of the road stuff. I'll be using 072 curves and Lionel O Gauge track with grades around 3% going up and maybe close to 4% going down. Should I go with one over the other? Proto Sound or TrainSounds? Any suggestions would be a great help. Thanks all.