I like to compare and shop around especially since I was going for a custom tank that was going to be big $. I got serveral quotes from custom builders, Reef Savvy, Coast to Coast, and some local aquarium shops that would contract to work out to other companies.
I ended up ordering a Reef Savvy tank that is due to arrive this Friday, and I can't wait. I went with Felix not only due to his willingness to talk at length about the tank that I wanted, but the attention to details. Additionally, the other quotes were close or exceedingly higher for what I wanted. Ultimately, I felt like more of my money was going towards the tank and the stand that I ordered from Felix, rather than taxes/shipping etc. The tank itself cost about the same give or take $100 from each supplier, but I wanted the whole package so that bumped things up a bit and changed the overall bottom line from one maker to another.