trying to find retro computer emulators for my pc

[Dragon Mech]

i'm looking for retro computer emulators for my win2k PC and could use some advice based on my system's
setup.


my CPU is an intel celeron code named mendecino clocked at 367Mhz.
i have 256MB SDRAM
my video device is an ATI 3D RAGE PRO intergrated AGP 2X with 4MB of video memory.
i have direct x 9.0c


i already have the MinivMac emulator and it works really well.
i have already had an apple 1 and an apple IIe emulator and i have no wish to have them again.
i also have dosbox.
any advise would be helpful