I think you have to ask yourself, if you are willing to risk it. Each person is different.
I find, in my experience, note, I said, in my experience, if electronics are going to fail, its going to be in the first 90 days. After that, in my experience, if anything is going to fail, its after the warranty is over, and the vast majority of electronic items for me, had 1 year warranties.
Some people will never touch refurbished with a ten foot pole, I am the opposite. I love refurbished, if its done by the OEM. (Manufacturer) It has been my experience, that whatever was wrong with the part, is usually replaced, with a better part. I have had recalls/advisories on electronics, called the maker, and they said to me, this doesn't apply to you sir, the faulty part has actually been replaced in your unit when it was returned to us.
My first Oppo player was a refurb. Some of my more snooty friends laughed, and said they would never buy a refurb, because its a broken item. Guess what, 8 years on, its still going strong. I have many refurbished and B stock items like this. Heck, my entire paradigm speaker system, that I bought B Stock, at about 70% of the original price, was all because the grills kept falling off. Guess what, $10 in magnets and some super-glue solved that problem. (I got lucky on this find, why they didn't fix it was beyond me, might have been end of model line, not sure)
The point is, only you can really decide. Each person, each manufacture, and each seller is different. For example, a B stock item from Sony, sold through AVS, comes with the full original warranty, at half the price. If you had a budget of $1000 for something, you can get something brand spanking new, or, go B Stock, Demo, Refurb, and get something in a higher class that you normally, couldn't afford, or was out of your budget you set. I think there is too much stigmata on refurb and B stock, since the reputable manufactures fix everything to original standards, but, you won't find me complaining, because I have saved a lot of money, and got myself into equipment lines I never could have afforded before.
I have never been burnt by buying refurb or B stock. I think, its all the same, new or B stock, from reputable manufactures. What you have to do, is spend some time researching which ones actually are reputable. Some manufactures don't care if its B stock you bought, or brand new. I had a B stock Breville grind and brew kick the bucket on me, a few months outside of the warranty, which was the same as new, guess what, got a brand new machine to replace it. Was B Stock that I originally bought, but, they didn't care. All they cared about was making sure, me, their customer, stayed their customer. Sending me a new machine, even though the warranty was over. I have told this story a dozen times, why? For me, it illustrates what I said above, its not about if its new, B stock, or refurb, its about the company, and how they stand behind their products, and customers!