Sears makes a decent compressor. I've had their oil-less 6hp 33gal laydown unit since '94. This would be fine for your garage. TRhey run around $350-400 these days. They are very noisy, but reliable (finally broke a rod in '9
and cheap to fix ($30 worth of parts). I used mine to power the garage I rent with 3 friends, and our usage varied from air tools to painting cars. We did always intend to get a big propane tank as an auxiliary reservoir, but never got around to it. That compressor is now on backup duty, as we now have an Campbell Hausfield 6.5 hp / 60 Gallon upright cast iron series. This one is just as noisy (different kind of noise though) but seems to keep up better.It does get a workout when I'm sandblasting or grinding / sanding. My garage is piped with 3/4" iron pipe throughout.
My recommendation is this. Get the CH or IR or any other 6hp 60 gal upright as they will do anything you want them to do in a hobby environment. You can get them at Lowes, Home Depot, Napa etc. They are single stage (125 pi max) and generally oil bath cast iron compressor. If you want a step up, get a two-stage @ 6hp 60gal (175 psi or more) and cost a bit more, but your air tools will run like never before. All professional garages run at 175, as they have big compressors. The extra air will not hurt tools like impact guns, air ratchets, but can hurt any free running tools like sanders and grinders, but that is why we have air pressure regulators both on the tool and mounted permanently.
I don't reccomend getting the "package" with your compressor, as the ones I've seen generally aren't very good quality. I've got Snap-on and Mac stuff. I just bought a CH high speed air sander for my latest project, and am very happy with it. WalMart carries the CH tools at good prices. They come in a couple of grades like "Serious Duty" and "Standard Duty". For things like impact guns and air ratchets, get the Serious Duty. For stuff like sanders and drills, you could get away with their standard. They have a good warranty, so don't worry. I'd try to stay away from the mail order tools that are made in China, Taiwan etc. Never had great luck with them, no power, break easy....
This type of tool is a "get what you pay" situation.