XP for ever and ever
Actually, I never tried VXACE, but, yes I tried VX and was really disappointed. Well, to be honest, if you have RMXp and know scripting... you don't need anything else
You'll be able to do anything you want without buying VXACE.
This is the main point in my opinion:
- lots of different tilesets;
- .ogg files are problematic;
This is a summary of my point of view.