The Inspiron 8100 is also the Latitude C810. They're clones of each other.
The Latitude C840/Inspiron 8200/Precision M50 would also be a good option. Salvaged a few of them at work (to use at work). I absolutely cherish the 1600x1200 screen and double-bay design.
1 side bay for the DVD drive / floppy drive / HDD caddy
1 front modular bay for the DVD drive / floppy drive / 2nd main battery
1 front bay for the main battery (basically, the 'extra' battery and the main battery are the exact same models)
obviously, 1 hdd. IDE44, not SATA.
So yeah it's possible to run 2x dvd/floppy/hdd caddy or 1x dvd/floppy/hdd caddy + battery or any combination thereof. 😁
C810/Inspiron 8100 is PIII-M with GeForce2Go, C840/Inspiron 8200 is P4-M with GeForce4-440Go