It really doesn't matter to me what's old fashioned; my comfort is the reason I've been researching these seat posts and that's probably the reason you're using one too.

I ended up going with the Redshift ShockStop and just go back from my daily ride. I couldn't be happier with this thing. I found myself chuckling a few times at how this seat post smoothed out the rough spots that I'm familiar with and have ridden over so many times over the years. My lower back felt so much better after this ride than it has in quite some time.