Old 80's stump jumpers make decent loaded tourers, they have slack angles,
71/ 68 perhaps 'Repack' bombers was the model, Tom Richey's bikes were the ones Synyard copied.
thing you gain when the seat angle-setback is a lower angle is weight bias, less weight in your arms.
look back at old TdF race bikes they were pretty low angle long chainstay designs, most roads were un paved then.
If the wheel choice is 622 - 35 and rate of travel is your travel priority , adopt a race bike 73 /72 main triangle.
of course Size of frame is another thing, angles is part of getting fit better.
Last edited by fietsbob; 07-28-10 at 10:19 AM.