Sir,
Many great buys out there. As you may already know to dave money buy a complete bike from one of the mass produced giants. One thing to note is sizing. Make sure you get proper sizing and the place where you buy allows you to make changes. For example pedals, seat, tape, etc.
Try to buy at least Shimano Sora or better 105. Make sure all parts are replaceable just in case you may need to replace an item, it doesn't get too costly.
Bianchi, Marin, Giant are nice brands that offer great value for the money.
As far as wheels, do not buy any of those trick wheels. Many do not hold up and no service can be found. Stick with conventional wheels.