Hard disk problem or?

I have been fighting with a boring problem for some Months now. I have changed Hard Drive on my Macbook Pro C2D 2.4GHz to a WD 500Gb 7200rpm Black Scorpio. It runs fine for some time but later the system stops working (spinning ball) and is I think the programs can't write to the Hard Drive any more.

I can't start up from the disk again or even the Recovery HD. When I start up from a cloned external drive, some times Repair Disk helps, but I have the erros's "Invalid content in Journal". A seccond repair is needed and some times the problem is fixed and the computer works for a few more days.

I have changed the hard disk three times now, but always get the same problem. So I start wondering if it's really the hard disk that's the problem?

Another thing that makes me thinking is that the first time it happend and I did not have a cloned Hard Drive to start up from and run Repair Disk and used the Lion USB stick I could not repair or even erase or reformat the Hard Drive. It was locked some how. But as soon as I took the Hard Drive out and put it in the USB cabinette it was no problem to erase etc.

This is getting on my nervs so any ideas or suggestions is welcome.