I have yet to buy a Blu-ray, but it's coming. I rent from Redbox quite often, and many times the DVD is out of stock but the Blu-ray id available. Since it's only 30 cents more to rent the Blu-ray, then I would do it if I had a BR.
I can't tell you if it's the same for Blu-ray, but for DVD players I have found the cheaper brands like Coby and Magnavox more capable than Sony and Samsung: My Coby and Magnavox players will play any kind of disc I throw at them, be it a VCD, DVD, CD, CD+G, or even a full DVD of MP3 or WMA files. The Sony and Samsung are very picky - DVD, CD, and MP3 on CD only. Of course, you take your chances - so make sure you buy at a place where you can return for a full refund / replacement within 30 days.
My Coby DVD was $25 five years ago and still going strong, while the $50 Magnavox upconvert DVD is 3 years old and works fine except that the front panel will light up randomly when it's turned off. I don't know what my Samsung DVD recorder / VCR combo cost new, it was found abandoned. It's got to be over 6 years old, and it still works. I do wish it had an digital tuner, though!