My little Costco compressor is giving up. It keeps blowing fuses and has gotten slower and slower over the years. I am finally ready to upgrade to a proper OBA setup so I can run air horns, maybe an air locker, small air tools, and be able to air up the tires.

I am looking at the Viair kits, and narrowed it down to 3:

pn 10003: http://www.viaircorp.com/OffRoad/10003.html
33% duty cycle, 1.38 CFM @ 0psi. Designed for 33" tires. ~ $285

pn 10005: http://www.viaircorp.com/OffRoad/10005.html
33% duty cycle, 2.56 CFM @ 0psi. Designed for 35" tires. ~ $347

pn 10007: http://www.viaircorp.com/OffRoad/10007.html
100% duty cycle, 1.66CFM @ 0psi. Designed for 37" tires. ~ $372

The first seems a bit small to me, and I think it would be worth the 60 dollars to go up to the larger compressor of the 10005. But then there is the 100% duty cycle for only 25 more. Is it worth the drop in CFM to have 100% duty cycle?

realistically, this will be used to inflate tires 85%, 10% using a blow gun to clean off dirt or even inflate a mattress or something, 5% air tool use (maybe less), and possibly a front air locker way in the future. I would also use it to power some small-ish air horns and to adjust my airbags.

OR, should I go piece together a set similar to this? I priced out the big components of the kit, and it is actually a decent value to buy it as a kit compared to a la carte.

Opinions? Thoughts? hurtful words?