Hey guys!

I just got into the mtb sport and I'm looking for an entry level bike. I am not going to do crazy stunts and huge drops but just some trail riding. After all, im just a beginner. I had a few bikes in mind:

Giant Rincon
GT Avalanche 1.0
Specialized Rockhopper

These are all 04 models. The GT and Specialized are $400 in my LBSs while the Giant is $340. Since the Giant is a little cheaper, it also has lower grade components and that's why I'm kinda leaning towards the GT and Specialized. Since both of them have pretty much the same components, how do their frames compare? Also, which one is lighter?
If you have any preferences for one over another I'd love to hear them. Thanks!