CompUSA branded drives are actually Maxtor drives. I have owned several and looked at several others and they have always been Maxtor drives.
As far as reliability/quality... I have never had a problem with a Maxtor drive. I have had Western Digital, Quantum, Seagate and IBM drives fail on me in the past. Just keep in mind that as safe estimate on the lifespan of a hard drive is about 5-6 years. After that you are just tempting fate.
In reference to the comment above regarding 'I like IBM drives'. In the past IBM has made some good stuff, and as far as corporate decisions would be concerned, that is what you buy. However, in the last year or so they have had some problems with their drives, including recalling some I believe.
Regardless this is a great deal, and my brother needs a new drive, so he will be headed to my local CompUSA tomorrow to get in on one of these.