Wow... looks like you're taking this whole thing awfully well. Glad to hear it, kinda.
Anyway, as has been said, the first thing I'd try if this was my system would be to buy a new power supply... preferably a quality unit... and try it. Best case scenario - everything's fine and it boots up like nothing happened. Wouldn't be surprised if it takes a CMOS reset first, but that's nothing big. Likely scenario - You end up getting a new motherboard to go along with that power supply. Worst case scenario - the new power supply puts out power to a damaged graphics card or something on the motherboard which proceeds to arc and ignite... somewhat funny, yet extremely
You don't really have much to lose at this point by trying a replacement first.
Best of luck.