It will without a doubt be suitable for Trainz , the only point of contention -IMHO - is whether a larger lappy at the same price would be more suitable.
On the plus side I have just restored my desktop back to working order by replacing the hideously expensive Corsair AX860i with a slightly lower spec one by XFX which actually works! So my lovely lappy is relegated to the subs bench.
http://www.ipernity.com/doc/pinzac55/27322665
My biggest complaint about the sub-sized machines is the display. Text usually ends up being the size of ant footprints, making the display useless for many applications. With Surveyor and its multitude of lists of light green text on a blue background, the larger display is surely needed, besides the larger display is also better anyway for navigating around and of course for driver.
John