The latest versions of mame do a very good job of making stuff look like a CRT. However viewing angle is deffo going to be important if you put a LCD in there.
If the old one works - then yeah - what everyone else has said - try and keep it.
Any ideas where I can get a schemaic for Truxton?
I've managed to get all three colours working by changing one iIC but the sound is not working.
Looks like the Z80 reset is low so need a a bit more info.