First off. The general rule of thumb is to take your sit bones center to center measurement and add 20-30 mm and that equals your saddle size. If you actually measure 100mm you would be more appropriately sized to a 130 mm saddle.

My saddle size is 143, ive measured it myself and done the assometer thing. My question was specifically to people who have a romin saddle and preferably have an ass of similiar dimensions... if they preferred the 143 or 155. If you do a google search of romin you will see many people size up. I prefer to try the saddles out but the only shop around me that carries them didn't have any loaners and have a rather ****ty return policy.

As to why I want a romin. They have great reviews. I own a variety of specialized products and I respect and trust the brand.