Correct, track dropouts are less convenient than forward facing semi-horizontal dropouts. However, if you don't change your gearing then your rear wheel won't need to be moved in the dropout and the brake pad position will only have to be adjusted once. Another convenience of the forward facing dropouts is that it is easier to install and remove the wheel, particularly with full fenders, and they typically include adjustment screws so proper wheel alignment and chain tension is maintained. If you decide to get the Van Ness, you might consider getting a Surly tug nut to make the adjustment process easier as well as protecting the paint on the dropout.