OK, glad to find this thread. I'd like to try a Brooks as well (125 miles a week) but find even the 'standard' b17 a confusing selection. There's this for $100, the atb/trekking model http://www.amazon.com/Brooks-Saddles...68572419&sr=8-, 5&keywords=b17+brooks at $136, a narrow, a heritage, and I'm sure I'm missing others. What the heck's the difference?