I would buy the
Sony DRU510A. This is an updated drive from their DRU500A that came out awhile ago. Sony was the first to come out with a DVD±RW, meaning it will burn + and - media types.
As for +R/ costing more, thats really not true. They are really the same price. But for the most part -R is used more, and works on the PS2 where +R dose not.
I would get this drive, it can do more than the A06 and I think is from a better maker. I was in Atlanta last week and went into a BestBuy and saw them on sale for under $300 and the older models for around $250. The older models are more or less the same drive as the DRU510A, just with an older flash. Talk to any one here with a Sony DVD burner and they will tell you they love it too.