My last personal build was The Dreaded and Feared Cranbrook, over 1500 miles, and after following all the good advice offered on this forum, I expect for it to last another 1500 miles.
If I could afford it, I would purchase one of Phantom Bikes. But then all the fun of building something that holds together is lost. But I would have one helluva bike.
Our Wal-Mart does not have an abundance of CranBrooks, they tend to cater to the little ones, and the MTB.