PRICE - QUALITY - TIME
Pick any two.
The point is it's nearly impossible to get all three. If you want something done quickly yet affordable, chances are the quality is going to suck, or if you want a high quality product, it will most likely be expensive because it takes a long time to make.
To be blunt, I am not aware of a safe which can offer all three of your requirements without spending hundreds of dollars. My advice to you would be to get a Gunvault/Minivault which can be had for $100-130. The safe is rugged, audible errors can be turned off, contents can be accessed very quickly, and the safe doesn't take up a whole lot of space. There are two drawbacks:
-requires batteries to memorize access code
-when opened, door opens with a noticable amount of force, slamming into the surface on which the safe rests
You can curtail the second drawback by putting a hand in front of the door to catch it; in the end the only sound is the *click* of the latch releasing (which is relatively quiet). At this point the only drawback is renewing batteries every year or two.