I just got a 3-9x40 Nikon Prostaff with BDC. I am very happy with it so far but have only had it out mid-day, not in low light yet. The image is very clear and crisp. Dick's has them for $150 and Nikon is offering a $30 mail in rebate. The only thing I don't Like about it is the BDC reticle. The drop for each circle in the reticle changes as you change the magnification. I have used other much more expensive scopes that the drop indicated by the reticle points is always the same no matter what magnification you're set on. That's much more useful.

Sports Authority has the Vanguard for $350 (if it's still on sale). I was planning on getting one but wasn't very happy with the trigger. Not very smooth.