Air Compressors

I am looking into an air compressor for me that I will also be able to use at home and also in a shop as well eventually which I plan to open.  I would like to use it for sanding fiberglass, nailing & staples.  Its funny how I can go into Home Depot or Lowe's and no one really knows about them or can tell me anything any different than what i can see (that one is bigger and has more gallon's...oh for real like I can't read).  If anyone could help me out I would greatl appreciate it.  These are the 3 that I was looking at.

Thanks,

http://www.lowes.com/lowes/lkn?action=productDetail&productid=236704-48540-K7045V&lpage=none

http://www.lowes.com/lowes/lkn?action=productDetail&productid=215921-71025-KLA1883054&lpage=none

http://www.lowes.com/lowes/lkn?action=productDetail&productid=99007-71025-VLK1582609&lpage=none

With a quick glance, the top one is oil lubed (which is good) not portable and probably what I'd want in a shop. The two lower ones are portables and non-oiled, which to me means a non commercial use and they wouldn't last as long in hard shop use.

Figure how many tools you'll be using at once will help determine what size you want.

Jim

iam not too happy wiht koblot products look for craftsman or IR...i had a kobolt and it gave out after 6 months