jwkwd
TPF Noob!
Well, you are the one that is asking opinions, with that said I would use the D40 as a back-up and look in the direction of a D300 or a good used D2x. I would also stay with Nikon accessories and not trust off brand names for battery packs. If you are considering going pro, or even semi, the last thing you need is miscommunication with camera and battery, or total failure. Not to mention a warranty would mean nothing. I am not much of a digital person, but with crop factors and such, it seems that an 85 +/- would be better for portraits.