i'm voting for bleem!
because it just gives me less problems...
about ePSXe, I think it's very good; plays a lot of games, nice graphics. But then, for most games, something's always not right. Obviously many people have sound problems (it's rarely perfect for me). Many have MDEC playing problems. Or maybe some display problem, like "the menu is missing" or something. I can list a few more, but you get the idea.
They might be small things, but it just takes away that much in the whole gaming experience. Sometimes you play a new game and you wonder what you missed, or how it'd be on a real PSX, if you only tried it on the ePSXe.
Coming back to bleem! Sure it hardly plays as many games. But when the game works, it works quite nicely. You won't have a lot of sound problems. The MDEC will always work. You won't expect any missing menu...
On a last note, the VGS would have gotten my vote (and probably a lot more votes) if it supported some kind of 3D acceleration.