I live in an area where the power fluctuates both up and down. Every few days the lights may flare or dim just a little, but only exceedingly briefly. However, I've noticed I have to replace light bulbs just a bit more often here than anywhere I've lived previously. My computer's hard drive also has been in the habit developing a bad sector or two every few months since I moved here. I initially attributed the drive problems to the drive just going bad (I've had it a little while), but began to think otherwise. When I recently upgraded my system I decided to play it safe and put in a UPS. I don't know if it'll make any difference with the new drive. But I have noticed the cooling fans now make a constant sound (they oscillated before), and the monitor's display is noticably sharper.

As a result, I'm considering a line conditioner for my audio system. First, do I need one? My system is modest:

Denon AVR-1802 Receiver
Paradigm Mini Monitors & Center
Velodyne VX-10 Sub
Panasonic C220 DVD/CD Changer
Thorens TD-180 Turntable

I looked at the one's made specifically for audio systems but they really cost a lot more than I'd like to spend, and just strike me as being way overpriced for what they claim to do. Am I wrong to assume this?

If getting a line conditioner is a good idea, can I use regular one? APC sells a one for "sensitive electronic equipment" called the Line-R:
http://www.apc.com/products/family/index.cfm?id=67

I can buy the 1200VA version online for about $45. But no local store carries it, so I really couldn't pick one up just to try.

Any advice is greatly appreciated.