I would revisit the salsa casseroll. I've been riding a pacer for a year, b/c I didn't want to wait for the casseroll to come out. The 51cm casseroll is very similar to the 54cm pacer (despite the sloping top tube). Otherwise, the head and seat tube angles are the same. The effective top tube is 0.5 cm shorter on the casseroll. The main difference is that the casseroll has a much taller head tube. Also, the wheelbase is a little longer (both fork rake and longer chain stays).