I've been looking for a motherboard that supports more memory and faster than my Socket 7 system that has the following specs:

Abit AB-TX5 Socket 7 with 3 ISA, 4 PCI 2.1 slots, 2 SD-RAM slots, 4 SIMM-72 slots* (Max RAM: 256MB) - Jumper-less configuration
AMD K6-2/300 Processor (66MHz FSB * 4.5 Multiplier)
3dfx VooDoo3 3000 PCI 16MB Video Card
RealTek RTl8139 PCI FastEthernet Card
Sound Blaster 16 WaveEffects CT4170 ISA Card
Roland SC-55 MK1 GS MIDI Module with the MIDI/GamePort splitter
Microsoft Sidewinder Precision Pro Digital Joystick
400W PSU
LG CD Burner (pulled from a Dell Dimension 4550)
Gigabyte 52x CD ROM drive
3.5" 1.44MB Floppy Drive
Maxtor DiamondMax 10 6Y200P0 200GB HDD (32GB limit setup by Seagate Tools for DOS)
SuperDisk LS-120 (unplugged due to system slowdown)

*SIMM-72 memory must match the speed and size per 2 slots (like the SIMM-30)

So far, I found this motherboard: a Shuttle AV18 V3 Motherboard that has a lot of trimmings on it:

Socket 370 (VIA 700MHz CPU installed on it)
3x SD-RAM slots (512MB installed on it, maximum might be 768MB)
1x ISA 16-bit slot
1x AMR slot (modem, sound expansion, etc)
1x AGP 4X slot (nVidia GeForce 6200 is supported)
5x PCI Slots
ATX (PS/2 Mouse and keyboard, 2x USB 1.1 slots, 2x RS-232 slots, parallel port, and integrated sound <-- looks like it can be disabled in BIOS)
VisionTek AGP NV966.0 (nVidia Riva TNT2) card
D-Link DFE-530TX FastEthernet PCI Card

***NOTE*** This is the board I found online.

Fortunately, I got a couple of cases from a thrift store for $4.99 a piece instead of $19.99 a piece ($9.98 instead of $39.98) + tax ($10.58 total).

I'm going to re-use my 520W Corsair PSU since certain boards require higher wattage (board and chipset dependent). What do you ladies and gents think? I might get a Pentium 3 processor to put in place of the one that's on the board.