Different ways to BW

I was reading one of my fav blogs the other day and this person is a specialist in her Black and White conversions. So I tried a tip she had mentioned about using the channel mixer in PSC2. Here's what I came up with...
Version one (Using the desaturation tool)

Version two (Using channel mixer)

Well, what do you think? Which one do you prefer? I must admit that I was really excited to find this tool. All you do is just move to monochrome and make adjustments to the different sliders. Pretty cool!