For "budget" I think you need to consider the total cost and quailty of your system. If you want a system with matched manufator's brand prime lens then Canon FD, Minolta MD and Konica are good choices as the lens (with a few exceptions) are very inexpensive. If you can live with 3rd party lens then Nikon, Pentex, Minolta and Canon AF bodies with Sigma or Tamron AF lens exellent buys. Determine what you want, set a price and do an Excel spread sheet comparing the diffent brands.