Give the Selle Italia line a look. Their Pro Link model comes in several incarnations with gel on some versions. I have enjoyed the time spent on the standard pro link model. I have however moved on to a Fizik Aliante Carbon - the best seat ever, with the price tag to match = $189. I have also heard great things about the new Arione from Fizik. Check em out at your lbs, if you have a good one they will let you try a few models so you can figure it out for yourself.

-Ryan