I've stayed out of this post up to now because everyone just seems to push what they bought so the value of each person's opinion must be taken with a grain of salt. As does this.
Since a Lone Star is one of your finalists, and I'm putting the finishing touches on mine, I'll add my biased opinion. I can't speak for the quality of service from the other vendors, but Brian will take care of you. I have his cell. I've called him on a Sunday and he answered. He's offered to ship me parts free of charge and otherwise see to it that I am a satisfied customer.
If you want a closer look at how one goes together, you can check out my build site
Red Venom