Oh, for the computer I'd definitely use a good quality UPS (APC Smart-UPS, for example), not a line conditioner. You get all the benefits of the line conditioner plus blackout protection. However, for home entertainment, I'd still rather spend $200 now than $1000-2000 to replace it all. BTW, what tower version is this? Does it have 12 outlets or 6?

I am the Doctor, and THIS... is my SPOON!