Tron, yeah, emulation is a way... it's just not the same though, at least IMO.
I'm playing the Zero Collection. I still think Z1 is the weakest of the Zero series, though a pretty sweet game. Probably guilty for being the first game and not super refined. The music is kinda lame for the most part, too (Z2-Z4 definitely kick ass in that department).
The weapon leveling up can be good and bad... it's good because if you have patience, you can max out your main weapons before even the first "real" mission, and it's bad because well, you have to grind. I prefer collecting power-ups for those skills, glad Z3 got rid of the level up.
And it's a lot worse farming E-Crystals... those Cyber-Elves sure like to eat. I'm aiming to get Jackson, which will make this run more challenging, although to be honest, after ZXA on Expert, Z1 feels much easier than before.
The best part about the MMZC is using Y and B instead of B and A by customizing the controls. Muuuch better.