You are getting great advice. However, I worry about your trying to buy on-line. You really need to be able to try seats out. In my experience there is just no telling what will work without using a seat for up to a week. My local lbs has allowed me to take saddles home to try for an extended period of time. They are very good to me and he knows I will be very careful (not ride in the rain) and pay for any depreciation if necessary. This might cost slightly more (or not if there is a used one he wants to sell for a deal) but you have a better chance of getting a comfortable seat that you can live well with.
I have six bicycles with four different seats. Plus my wife's which also has a Brooks. The best bet based on this sampling is a Brooks.
Gel = fail.