Yeah DM & CSB in SDL would have been great. Let me tell you about a real cool shoot em up game. Tyrian.
Tyrian was originaly a Dos game. You could´nt play it with out a dos emulator (DosBox).
That was the situation early last year. Now Tyrian has been ported to SDL, it is available to these platforms:
Windows, Mac OSX, (and Linux I think?) PSP, DS, GP2X, Gizmondo, GameCube, Amiga, Dreamcast, and Nokia Internet Tablets.
http://code.google.com/p/opentyrian/
Would´nt it be cool if DM & CSB got ported to more platforms?
Anyways...the reason I am writing is to give you a little update.
I have been trying Crossover Games for Mac. I am now playing DM/CSB for Windows. No Bootcamp, no windows emulation at all. It works perfect. The only downside is it takes a little time to load and it cost $60. But it works.
http://www.codeweavers.com/products/cxmac/