+1 vote for the red ARB deflator. Have never used Stauns, so can't comment on them, but I like the ARB one.
I've been meaning to get one of the blue gauges for airing up. Currently I just use the standard air chuck that came with the compressor kit, and while it does the job, it means having to carry a separate gauge. So currently I'm relying on a not-very accurate cheapy slide gauge. I'm thinking the blue one might be a good investment.
I'd never thought to use the blue gauge as a deflator though. Might be good for times when you don't want to go to the trouble of unscrewing a valve stem for just a small adjustment (IE, airbags). Thanks for the tip Cam!
Thanks!
Matto