Those MX sound very good, could not find anything about legacy support, but these Yamaha PCI sound cards are very cool if your mboard has a PC-PCI conector (also known as SB-Link) for DOS legacy support by hardware, and you can load your own set of instruments because it uses RAM to store them. OTOH too much of PCI add-on cards will stress the chipset and it can even slow the PC down, so you could try the AWE Gold.

No matter what the Pentium is I wouldn't bother with a SLI setup other than for higher resolution capability, even a single Voodoo2 would not be a significant advantage over a Voodoo 1 unless you're seriously overclocking the CPU.

The original voodoo is the best choice for a Pentium, go for a Voodoo2 only on a PentiumII, particularly if you got a Deschutes or higher FSB CPU.

Sorry mate don't know what a wavetable is, I do have a soundcard with a wavetable connector, just don't know what it is for. (yet)
Good luck 😉

Monster Sound MX300 is Vortex 2 so that is a great Win9x sound card. MX200 is its predecessor and is nice too, plus if it's really a MX200 it has a 4MB MIDI daughtercard with Roland samples. Both of these support A3D, but the MX200 is only A3D 1.x. Neither are ideal for DOS games but the MX300 is the better of the two with its generally usable SBPro support. The Monster Sound/M80/MX200 can only do DOS in a Win9x DOS box AFAIK.

AWE64 is basically an AWE32 so you can use the AWE32 or SB16 options in DOS games. Depending on your system BIOS, you may need Creative's ISA PNP setup util to set up IRQ/DMA/Port of this PNP card. It's a decent DOS choice. Its main issue is, like AWE32, it needs AWEUTIL to emulate General MIDI if you want MIDI from a game that lacks native AWE32 support. BTW, as far as I am aware there is no utility to load soundfonts in DOS, but you can load them in Windows and play DOS games in Win9x if you want to. Typically in DOS you use the sample ROM instead.