I haven't had a chance to actually work with them yet but their pricing seemed really good. They also send out nice brochures with all the different types of channel letters they offer.
http://www.directsignwholesale.com/
I used them for my first ever channel letter job. I told the sales person I really had no idea what I was doing, and I needed a bit more hand-holding than the average customer. They ASSURED me I was in good hands, and they would help me out with any questions, etc. Well. Lets just say they screwed me over by telling me a wireway was exactly the same thing as a raceway, only thinner (the town only allowed the sign to project 9", so a standard raceway was out of the question. It was still over 9" when I received it, even though I said MULTIPLE times it needed to be less than 9" wide.)
Its not the same, and when I showed it to my installer he was like WTF is this? We wound up installing it ourselves and having to drill through concrete block to put the connection inside. It worked out fine, but it wasn't what we ordered. AND The kerning sucked. I never realized that channel letters have almost no space between each letter, and when I asked them about the artwork, they could have mentioned that fact. If someone sends me crappy artwork, and specifically asks me if its okay for the sign, I'll tell them what they could do to improve it (kerning, line weight, etc.) The sign would have looked 1000x better if there wasn't so much room between the letters. I know that sometimes you have to do something wrong to learn how to do it right, but jeez. I ASKED if the artwork would work well, and then said SURE! its Perfect! And it clearly wasn't.
The product itself was fine, but I will probably not ever use them again because of these issues. I really felt like they just straight up lied to me. Perhaps others have had a better experience or if they already know it all, then they are most likely a great place to order from.