I run 2 GB colors for that exact reason.
High bpms kill the DMG, having two V-commands at once is lethal (check if you can erase some), and having KIT play two samples at the same time is hard as well.
If you are able to avoid these, and the DMG's still freezes, go with GBC, easiest and cheapest to find, less battery problems on live shows, and you can change the color setting to white background/black letters for a clear, visible screen in dark areas.
The bad thing is that they don't have the warm, loud bass the DMG has, so a bass mod or blasting the Bass-knob on dj mixers is used. Yet many people think the "mixer knob-cheating" sounds good enough.
Second bad thing is a silent, yet annoying high pitch "buzz". It disappears when the music is busy, but if you use a lot of silent moment in your tracks, it might be best to evade these things.
Third thing, and this might be just mine, but they give a low pitch buzz when touching the arrow buttons and the A and B buttons. This is kind of annoying when you're scrolling through a song (for live LSDJ'ing) or when you're selecting another song live. The song select buzz can be evaded by cross-fadering on the dj-mixer. But for live LSDJ'ing you have to roll with it (I have a few tracks with live LSDJ effects, but the buzz is "calculated"), or you have to evade doing things with your tracks live.
Other options:
Advance has a weird place for start and select buttons for LSDJ handling.
The Advance SP (mine freezes up all the time for no reason) requires adapter plugs for headset and cinchc-cables live, which arent always easy to find. But some people use them.
Some people use modded PSP's and are quite happy about that, I think.
ROMS on emulators on pc, but I think that's just silly for playing live.