I have a feeling there is an issue with the grounding on the OCZ SSD drives.
I could not nail down my filthy FM radio interference, tried moving cables everywhere, nothing seemed to improve the interference problems.
I was installing a ground loop isolator on the line in, and my wrist pressed against the underside of the SSD, and my interference dropped to almost nothing. Pulled my hand back, it came back.
I found that the chassis of the SSD isn't properly grounded, and because I had it mounted to an MDF board, it was causing havoc.
Ended up running a ground wire from the base of the SSD case to common ground, and that solved it.
Might be worth trying for yours, see if that fixes it, but it sounds like a similar issue, and if so, it would point to OCZ brand SSD's at the least having grounding issues.
I'm actually planning on rebuilding my case for my car computer, and relocating the SSD to either a computer indoors (And pick up a new sandforce based SSD for the car), or alternatively, put it into a shielded case, with full grounding, and as far away as I can mount it!