Better get one...
It's not very smart to run any "expencive" electric device without one... TV's stereo's computers... Only takes one good surge or spike to kill one.
Besides... It's surprizing how many cheap off brand powerstrips that people use, don't warrenty, or have warrenties that they can worm out of. :\
Best if you're gonna just use a power strip to stick with a large name brand and pay that extra $5-10 for the warrenty.
Surge protection is not one area that should ever be skipped over.