You should buy the best quality bike for your money.

Walmart bikes are not in that category. They're mass produced, cheaply built, come in only one size and are disposable.

Like the other posters said, you have BD, Nashbar and Performance. You can also look for quality cromoly vintage bikes on eBay. Bikes made of Reynolds 520, 531 and 853 are excellent values if you could increase your overall budget.

High quality bikes will be built of double butted steel or alloy, will carry a higher price, comes in several sizes for the most accurate fit and they will last a lifetime if taken care of.

What's the old adage here? Learn to buy for quality, not just for the bottom line. It will make you a happier and more satisfied consumer.