I wouldn't buy anything from OWC unless they are the only big manufacturer in the market, such as their blade-style SSDs.
It's WAY overpriced for just about everything. Once upon a time, you needed to get Mac-compatible RAM, etc. Nowadays, there is no reason to pay a premium for the same/lesser quality when you can get it cheaper from Amazon or Newegg.
And definitely don't buy a PATA SSD from them. You don't have many choices, but the cheapo Kingspec I got from eBay is working great, and you don't have to pay through the nose for it.