electric is way better than gas IF you have the choice. less noise and electric
is like 60% more efficient. But if yourr in construction, gas might be better
but i guess you can tap off the temp pole. Anyways. the biggest thing you need
to know in "how big" is figure what tool uses the most "csfm" toolowners manuel
will list in the specs. "CSFM" is cubic square feet per minute. Most tools
will use aroun 4-7.5 . see how much each nail gun uses , add that and get a
compressor that is listed to put out that many csfm.