I kindly and respectfully disagree, with the comments and consensus that the CM-500 is a substandard MIDI and gaming solution, as opposed to say having separate MT-32 and/or CM-32/64, with SC-55. I have listened to some of the ppl here who pointed out the higher vibrato, etc., of the CM-500, as well as some of the sound samples demonstrating the difference in effect, but I personally heard hardly if any difference at all

Having the CM-500 lets me switch between SC-55 and LA modes with ease and minimal fuss or reconfiguration hassles.
As it is, the way I currently have my classic gaming PC / MIDI box set up, I have 2 ISA slots, one with an SCB-55 installed for SC-55 mkII capability, but I hardly ever actually use it -- it functions more as an MPU-401/AT interface to my CM-500

In the other ISA slot, I have an AWE 64 Gold installed.
I love this the way this is set up, b/c with having Yamaha speakers with 2 audio inputs, it basically gives me a SC-55mkI, SC-55mkII, CM-64, and Sound Blaster + AWE 64 Gold MIDI capability, all on one box, with minimal wiring changes needed -- the only time I have to swap out the cables is when I want to use my SCB-55, in lieu of the CM-500 (which hardly ever occurs though).