You can age any cigar as long as it's not too stale (cracked or crumbles), it just takes time.
There is alot that goes into selecting a humidor:
SIZE: Figure out how many cigars you want to keep on hand. Multiply that by 2 or 3 times and that's the size of humi you should get. Trust me on this one, you WILL run out of room fast if you buy one too small. I started with a 25 ct, ran out of room and bought a 120 ct about 2 months ago. Now I'm almost out of room again!
PRICE: Don't skimp on this one. You spent alot of money on cigars. May as well spend money to make sure they are kept properly.
HUMIDIFICATION: If your humi comes with an analog hydrometer...chuck it as they suck. Digitaly ones are more accurate. They'll start at $20 and go up from there.
As for the humidification device, get the RH beads the ones that use florist foam don't regulate humidity, only add humidity when it's dry. You can buy the beads loose and make a small sack out of old (but not used) panty hose, get a RH tube or get something called "The Puck". I went with the later and have not had any problems with my humidity levels.
SEAL: The seal should be tight and when closed, you should hear it "puff". A good test is to put a flashlight in it, close the lid and turn out the lights in the room. Light should not escape out from between the lid and the body.
Make sure you keep the humidor out of direct sunlight and in a room that doesn't get to hot or cold. As a rule of thumb, 70 degrees and 70% humidity is ideal, but you can adjust that to your liking. Just don't exceed 75 degrees or you risk beetle larvae hatching and eating your cigars.
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Back by request:
Mom: "Twenty dollars for a cigar?!?! Why don't you just set fire to a $20 bill?"
Response: "Get a $20 bill to taste like a Davidoff and I'll light my entire paycheck on fire!"
