There are two ways to go: pretty and working railroad. For pretty, and the best eye candy, Railworks is the best yet. Very nice realistic layouts. You can get a moderate range of routes mostly UK and european and equipment..a few US routes and some equipment but very little from Steam era...but..and a big but it is VERY not easy to add equipment to routes ie choose what you drive for which routes. it is a big pain in the caboose and the developers just dont give a damn to make it any better after some time after release. And most add ones are payware, it is NOT as cheap or easy as the standard which is... so it is not really user friendly.
It is part of Steam and you have to belong to that monster to get content but once you own it, you can unplug from Steam and run the sim happily ..tho not many know that. You own the content so you get to run it as you want as far as i am concerned.
Microsoft Train Simulator 1.0 (2.0 was cancelled when almost ready to go Gold)...
It is an older sim, so the graphics will never be equal to even say FS9....but there are thousands of routes and tens of thousands of engines, cars and equpment plus buildlings and scenery elements galore to make whatever route you can imagine from mainline US, most of the major routes, to UK tons of great ones from steam era to modern, French again steam to modern, Germany ditto, Switzerland a tonne of nice ones, Germany some mostly payware but decent, Italy wonderful steam era routes works of art really, Italy ditto, Spain, even as obscure as the tiny narrow guage route in Eretrea, North Afrika pre WWII! And MSTS has working routes, i e signals, switches, lots of accuracy in daily operations possible, and even some virtual cabs for engines, and you can really get into the technical side of steamers and what you have to do to make them work....
The Daylight in the Days of Steam: Jeff Farquhar's great Coast Route running thru Del Mar with the SP 4449 pulling to San Diego..
Orient Express pulled by a great French Pacific by Granado..on the default St. Anton's Pass Route with enhanced trees and more...
the Fi Li Po Route from Steam Era Italy, one of the greatest routes yet, beautifully done and available from Il Deposito website in Italy
Skipton 1920 Steam Era from the UK, some of the very very best routes ever yet done by the UK extensive train sim community and they are still making more.
Highball at Night on the Hudosn Valley 1940 route
New Routes are being made, not as many as in the Golden years a while ago, but still some major ones like the west coast route which is getting extended north from LA, and the PRR which is constantly getting enlarged....and more european routes on the works all the time..
Open Rails is promising, it is MSTS with better graphics and new add on features it is in the works but there is a beta you can try.
This is a pic from Open Rails Beta it will run any MSTS equipment but some OR stuff wont run in MSTS..
this is a nice engine by Capt. Bazza...
Default St Anton's Route from MSTS with some great french equipment a Pacific pulling the full brake of the Orient Express....
I dont know about OpenBVE...but the graphics look limited..flat light and not much bump mapping and landscape looks artificial. I like realistic
enjoy.