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First one is a 3.5" IDE - no good to you

Seccond one, eBay.com, seems ok but no idea what brand it is !

I would suggest you search for a Western Digital Scorpio 2.5" SATA laptop drive - I am guessing that you are in the USA ?

I have a WD 320GB in my MacBook and no problems at all.
 
I had a Samsung Spinpoint 120GB 2.5" SATA HDD in my Gen1 MacBook and it served me well. I just added a Western Digital 320GB 2.5" SATA HDD to my MBP and it is working nicely.
 
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