The truth is, Deth, Bleem PC sucks for more than just glitches. It was also slow, ridiculous (window kept resizing even in full screen mode, res kept changing, etc..), memory cards didn't bother working, it crashed, movies skipped, CD-ROMs had problems reading, you couldn't swap discs for some multi disc games, and basically Bleem was just a sad excuse for a commercial product. Oh I forgot to mention that many people experienced these issues on very high spec machines, not just crap ones. And then Bleem refuses to admit it's their program, and instead blames it on 3dfx, or tells you to update all your drivers (even though they already were) or even DirectX.
Have you tried playing a 2D game in D3D mode?
Now what I'm saying is, even though it will fare better on a DC, "issues" will be inevitable, and how will they be fixed?
Second question is, can the DC read backup PSX discs? If not, forget it. There's no way I'm going to buy PSX games to play on Dreamcast when I can buy and play Dreamcast games instead.