I have 3 machines. Fresh, UX20, Car Marty.
Generally speaking I do not recommend getting into Towns without extensive research.
The amount of good exclusive games is very low, but hey Rayxanber is rather awesome.
The Marty is basically a barebones gimped PC, so it has the smallest library. A lot of the stuff
online is flat-out false. Splatterhouse for example is an excellent port for its time, but it is not "arcade
perfect" like most websites will claim.
If you want to get into Japanese computers, I'd say the X68000 has the best game library, but the hardware startup costs are high. MSX is also a better deal the Towns imo, and probably the cheapest if you are happy with a flash-cart.