classiccmp server hardware

I said I'd look at what is in there, here's the scoop. Boom 1U case, room for MB, PS, many fans, two HD's, slimline floppy and slimline CD, and a single PCI card ASUS TUSI-M motherboard Intel Celeron 1.2ghz, 256K cache, 100mhz FSB (2) 512mb low profile SDR DIMMS Mitsumi SR243T1 slim cd Citizen OSDA-39D floppy drive (heavily modified with a dremel tool to fit right) 20gb PATA drive for OS 160gb PATA drive for data, list, websites, etc. The motherboard ide controller is ATA100 or 133, I forget which. Before you snivel at the hardware... the classiccmp server doesn't NEED to be extremely fast and seems to do just fine with the horsepower it has. Of course that's because it runs FreeBSD (trolling). The end-goal here is reliability in case of drive failure. I see two options. I could get an additional 160HD, a Promise raid 1 card, and a riser card (think I already have one). Then the OS & data would be on one 160gb drive and we'd mirror to the other 160gb. This is the cheapest option. The other option would be using a motherboard with built-in raid. This would involve replacing the motherboard, the memory, and the cpu. Perhaps the power supply too, which may or may not mean a new case.... I would still need to buy another 160gb drive. Definitely a lot more expensive. Plus since it's an older 1U case, trying to find a motherboard that fit it just right may be troublesome with boards being sent back cause they dont fit, etc. Plus the frustration of trying to make sure the newer/faster processor heatsink and fan would fit into the 1U case, which can sometimes be impossible. In the event that the server runs out of horsepower, if we go the first route, we wouldn't have lost any investment cause we'd still be able to use the two 160gb PATA drives. The only money wasted would be on the promise RAID controller. So, my vote would be to go with another 160gb, riser card, and promise raid 1 card. But I'm open to any and all options. Theres about $200 or so in the kitty right now for the server. I'd love some input, mayber there's options I haven't thought of. Regards, Jay West