Compressor and air tool question

Really starting to get going on my 70 duster complete restoration,
and finding out the compressor I've got just won't handle tools like DA sander and the angle air grinder for any length of time. My current compressor is a Husky(home depot) 25 gallon 5.5 peak Hp with a rating of 3.5 cfm at 90psi.
I've decided to get a larger compressor and been looking at 60 gallon compressors at Home depot, lowes, and Harbor freght, that all run about $400.00 they all seam to be rated at about 10-11 cfm at 90 psi.
My question is will these do the job, the info on the compressor very, some saying these types of tool can be used and others say Intermittent use only.
I don't want to spend much more then this, if I don't have to.

thanks in advance for any input. Richard