Hi:
I installed a SpeedVault 500 safe from Gunvault on the backside of my nightstand.
http://www.amazon.com/exec/obidos/ASIN/B006OGNLKA/?tag=2ahawaii-20Totally out of sight, and it takes about 2 seconds to have my gun in hand. Only one complaint: when you enter the combo, there is a "KLUNK" as the counter-weight drops and the door opens. I don't think that noise will be the difference between life or death. Once the door is open, the pistol's grip is right under my hand. The safe also has an LED light that helps me see what I'm grabbing onto! If you prefer, you can put tape over the LED. Plus, you can turn on/off the BEEP when pushing the buttons.
I chose to go with buttons versus biometric. No problem with misreading fingerprints, and I can share the code with as many people as I want to have access.
The safe is solid enough to prevent unauthorized access or random theft. It is NOT strong enough to prevent a determined thief. I don't worry about it being mounted to a moveable nightstand instead of the wall which is also an option. When I'm away, I store the pistol in a sturdy safe that is more secure and fire rated.
The best handgun safe will be the one that is completely hidden from view and which you can still open quickly! If you plan to keep the pistol in this safe 100% of the time, then look for a better one with both fire and theft protection. Those will run you more than $150.
Only you can decide how much security is enough based on your use and the size/number of handguns.
Hope that helps!