[bcdemon]

Hi Alley, you could spend the extra cash on the synthetic underlay if you want. But I am still pulling off 20-30 year roofs with tar paper that is still intact and still doing its job properly.
The biggest benefit of the more expensive Diamond Deck is you can underlay the roof and leave it for a couple months if you had to before shingling it.
But if it is getting roofed right away, I would save the money and go with Roofers select. Again, if roofed right away Roofers Select won't buckle, and even if it gets wet before shingling, let it dry and it lays flat.

 

[bcdemon]

If a shingle blows off, yes the synthetic underlay will protect your roof for a longer period of time than tar paper. So you won't have to get it fixed right away, even though you should.

Landmark Pros are worth more than regular Landmarks. Whether they are worth $2125 more depends on each region. That and without knowing how big your roof is (sq ft) it's a tough guess.

How long does the roofing companies "workmanship warranty" last?
That combined with the regular warranty is sufficient for most folks.

If anyone tried to sell me a box of roofing nails for $200 extra I would tell them to go pound sand. Any roofing nail that comes out of a pneumatic is going to grip pretty good. My opinion.
Those Maze nails are EXPENSIVE lol, $130 for 3600 nails, even Stanley nails are only $45 for 7200 nails.
The nails ours and most other suppliers have are of the cheaper kind. Stanley nails have a rough finish on the head so when the air guns hammer comes down it grips the nail and drives it straight. The cheap nails have a smooth head where the hammer can slip and drive the nail crooked.
1 misplaced (crooked, under/over driven) nail can void the entire roof warranty.