I guess the depends on what you mean by "personal" use. Many folks have been running servers in their homes for years. Newegg has more than 50 dual processor boards, and 4 or 5 quads. And some hard core gamers may use them for LAN parties, or just braggin' rights. Looks like the cheapest at Newegg is the Tyan S2696A2NRF (SATA) Dual 771 for $380USD. Or if budget is not in your vocabulary, you can go for the Tyan - S4881G2NR Quad 940 for a mere $1787.99USD - must be in high demand, I see they are currently out of stock.I never really imagined that those types of motherboards were on the market for personal use.

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If your current supply is still good (just underpowered) then probably no additional damage was done. Usually, a stressed power supply will simply cause unexplained reboots, crashes, or graphics problems. It is rare for a power supply to cause additional damage, but it does happen. In fact, we must remember, anything that plugs into the wall can kill!
If not, pick a different PSU. Why buy a new PSU that does not meet your current or foreseeable needs? The two PSUs you selected do.Also, most of the PSU's that I bring up don't have two 6-pin PCIe connectors,