BH21, I'll give you another good tip as far as what you choose to plant. If your ground is not in real good shape as far as being weedy and low pH, I would not spend a lot of money on seed. The best seed for the bang and the $ in less than desirable soil conditions is winter wheat. You'll waste a ton of money on high dollar seed that do not reach their potential without well maintained soil. I know this from years of planting in these types of soil on various leases.
I don't really know too much about Winter Wheat...Is that a good northern zone plot (WI)? Can you tell me a little more about it? Sidenote, we just put down 3 ton/acre this fall so hopefully that brings the pH up a bit.