Here are some of best SNES game and the very best emulator

SNES emulator

SNES emulator (best one i know of)

Here are some of the hots DBZ games for the SNES games

Hyper Dimensions (american)

Dragonball Z Super Boutoden 3

Dragonball Z RPG

Both of the games above are in English. The ones below are in japanese.

Super Boutoden 2