I'm going to have to recommend the Marzocchi MX series, assuming you're using your bike for XC style work and are after 3.5 - 4.5 inches or so of travel. I couldn't find any info on the B2 so I'm not sure what it's replacing. I have found mine to be tough, effective and very easy to ignore while riding.
Edit: just find the Y33. Yep, still recommend the zokes.
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