We are planning on planting 'Aptos Blue' or 'Soquel' pine trees. I am just wondering how bad they drop their needles.
Aptos Blue and Soquel Pine Trees
Aptos blue is a variety of sequoia (redwood) and grows up to 300' tall. Here's some information on them: http://selectree.calpoly.edu/tree-detail/sequoia-sempervirens-aptos-blue
I can't find any information on Soquel pines. Soquel is a park/forest in California, perhaps you've seen a pine variety marketed by some grower with that name. You would need to find out the true genus and specie for that plant to learn anything about it.