I'll add to Ted Hikel's post on ScaleTrax;
Someone mentioned there is a limitation of switches available, While this is true, There is an excellent workaround.
Ross Switches are considered the Best by many here.
And if you look at Ross Rail next to ScaleTrax rails, they are VERY similar in both shape and size. The Ross rails are slightly taller.
Now, Ross Switches sitting beside Scaletrax shows a marked total height difference.
But it is easy to overcome !
Put your Scaletrax on 5mm foam roadbed which eats noise.
Put the Ross Switches on 2mm Cork. You are done, they will match at rail tops.
Yes, the 2mm cork does not reduce track noise much, but the length of a switch is not going to make that much noise anyway. And Ross Switches use Wood ties, those also eat noise a bit.
And Ross has the widest selection of switches I have ever seen.
I got a pair of O-72 Wyes from Ross to use with my ScaleTrax layout.
They are great. And from what I have seen right here on the forum, Ross Service is the best.