I believe that no-name brand will come out on top - let me demonstrate with some simple math.
Name brand
-$50
-Works 100% of the time, guarenteed or money back.
No-name
-$25
-3 out of 4 are functional, and if it's broke, too bad.
So I purchase 4 of the name brand, all of them working, for $200.
My friend buys 4 of the no-name brand, but OH NO! One of them is broken, and cannot be refunded! He has to buy a replacement, which brings his total to... only $125, which is $75 cheaper than the name brand. Oh, I forgot tax, which bumps it up to $135. Bummer.
In reality, no one sells a product that's defective 25% of the time without going out of business. Also, you can find no-name products for as low as $10 to the name brand's $50. This demonstration doesn't take into account the life span of the product, though I've heard sources claim on the radio that no-name brands average out to live as long as name brands. I can't back their reliability, but I've had lots of success in avoiding name brands.
Yes, no-name parts are a gamble, but the odds are almost certainly stacked in your favor.
Admittedly, I don't know anything at all about preferred accounts.