Well, I'm  plugging cards into the riser, and I am totally torn with indecision.  The original idea before I got the PCI/ISA riser was to just go with a Radeon 7000 PCI and an SB Live! Value and install Win98/Win2K.  Now that I have the ISA/PCI riser, I got more ambitious; as this allows me to be more compatible with older OSes, I got myself a G450 PCI and an AWE64 Value, so that I can also install MS-DOS and OS/2 Warp 4.  I really want this to be an all-in-one retro PC covering my whole experience between 1992 and 1999 (possibly 2000).
I can add up to three expansion cards to this board, 1 PCI, 1 ISA, and 1 shared ISA/PCI.  The cards I have at hand are:
- Radeon 7000 PCI
- Matrox Millennium G450 PCI
- Onboard Intel 810 DVM AGP
- Sound Blaster Live! Value PCI
- Sound Blaster AWE64 Value + 32MB (SIMMCONN) ISA
- Sound Blaster 16 CT2290
- Yamaha YMF7199B-S + Dreamblaster S2X3M ISA
Now, I can
 
A) Ditch the DOS and OS/2 ambition, just install Win98SE/Win2K and go with a Radeon 7000 PCI/SB Live!/SB16 combination which would be a lot faster for later games but a lot less cool..
B) Follow my dreams and do the whole DOS/OS2/WinMe/Win2K thing with a Matrox G450/AWE64-32M/YMF719+S2X3M which would probably perform worse in 1998+ games but be a lot better for 1996- games..
What would you do in my place?