I have the Bosch PS31-2A and I think I paid around $130 for it. Amazon is
currently selling it for around $109 with free shipping:

http://www.amazon.com/dp/B003BEE2LU/...800_pe_vfe_dt1

I recall a recent discussion where somebody had been looking at all the various
drills in this category, and this is the model he wound up choosing. I'm half
tempted to pick up another one...

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