Whatever you do, don't buy the cheapest door you can find at a big box store (especially Menards!). If you're wanting a wood door, I'd say go with Andersen - Marvin is even better, but they're very expensive. The Andersen door has vinyl exterior and wood interior, make sure you are asking for the Narroline door and not the PermaShield door. If you don't mind vinyl, there are some very good doors out there which will be 25-30% less than wood. Gerkin (from Sioux City, IA) is the best one I've seen. I would expect to pay $1200 or so for a good wood door, maybe $800 for a real good vinyl door.