I really like C.O. Bigelow Elixir Black. I personally think it is the best men's fragrance B&BW sells.
I used to have B&BWs Cool Spring a long time ago. I found it to be a nice, light summer fragrance. I haven't tried the Mountain Frost. Most of the BBW fragrances that I have encountered do not have great longevity.
I also like the B&BW Sensual Amber fragrance.