Loving that Open Pandora pic with the relevent 'O' and 'P' keys showing only!
pmprog, it is only a small screen on the Blaze im afraid, not as nice as a larger phone screen or Pandora's but i find it ok to play on myself. It is small though compared to most screens you find these days.
Prometheus, Ive not had any glitches with mine, ive had pretty decent sessions on it too, over an hour at a time, though most often its a quick burn of something for ten mins, but i have played for an hour or more with no problems. I got my one about 4 months ago now, so it maybe running a dif emu for all i know? I dont use the TV out either so cant comment there.
I have an xbox for megadrive games on the large screen, so i tend to pick the Blaze up for its portability and to take when im on buses or whatever.
The company are also involved with this, its the other one i mentioned im waiting for:
http://www.gamegadget.net/
the footer states is a blaze company. Only the 4 buttons though so no good for pmprogs use.
Personally i think the Pandora is best option, even though i not even help one myself.
Not meaning to sound like money is easy come by, i know its not for the most of us, but these blaze are under 40 quid, might be worth seeing how you get on with it and its small screen, and if you dont like it put it on the bay and you shouldnt lose out more than a few quid.
edit -------- probably because of the smaller screen, i do find the battery lasts well on my Blaze btw