Is a 5 Slot CF Raid a good idea?

5 slot CF RaidNot sure about this, but might be worth a look.

Addonics Product: Sapphire 5-Slot CF Drive.

The cheapest 128GB CF card I could find is the Komputer Bay card, although I am not sure I would trust this.

That would make a 640GB Raid 0 for about $853.

I think for that kind of money, I would rather have the Promise J2.