Re: 12 volt stores you trust
I admittedly don't have a TV, but the only things that I have to run on 110 are the microwave and the charger for an electric razor. I've seen plenty of 12v TVs - and even DVDs - that have been in service for many years, and can't think of a reason not to go that route.
A comment on inverters: As Jim said, some inverters will be only 85% efficient, though the better ones will get closer to 90% at max. It's often a case of getting what you pay for, and inverters aren't cheap. If you can swing a pure sine wave, you'll eliminate the hum and potential problems with your electronics.
But getting back to the original post, I've ordered lots of stuff, both boat and other electronics, through smaller online shops. One of the advantages is that you're usually able to get someone who knows the product on the phone. I like Amazon's reviews, but hearing from someone who's really familiar with the thing, and maybe knows the return rate first-hand, is a help. I was even able to get replacement lenses for my yellowed cabin lights from a solar outfit in AZ, at a fraction of what I'd pay elsewhere.