I too was interested in a Jack Russel terrier, but ended up getting a slightly larger terrier breed instead - Irish terrier (also mellower with age and
way-too-expensive)
I would ask if you've talked to lots of people that have JRT's? Have you been around any for extended period of time and asked about any problems that owners have had? They are
great dogs for terrier lovers or people that have had dogs before, but I'm not sure I'd recommend them to a first time dog owner.
Now, having said that, I can understand the desire to have one. They are
cute, small, fiesty, super-active, like to go on LOTs of walks, have a tendency to be independent thinkers.
The last bit comes from their original breeding being for a dog that can go into tight places and think on its own once it reaches a rat, fox, or whatever quarry the dog (her/his owner) was hunting. The 3 that I know give me my JRT fix, without having to worry about keeping my dog from killing and eating small animals - the 3 that I know regularly eat anything they can catch and eat, including mice, voles, rats, squirrels, musk rats... I don't know about small birds or cats, but I'm sure they'd be interested.
Rescue dogs can be a GREAT idea. Pound puppies, rescued greyhounds, rescued research dogs...or even
rescued JRT's, are LOTS better than buying a dog from a pet store.
Why the
2 week count down? If you don't already have a dog selected, I would take more time to talk to owners, go to a dog show to meet JRT's, or find a local JRT club that can provide
great advice and things that you should consider before getting your dog.
I've been a primary-care-giver to my dogs (not just
having a dog in my mom and dad's house) for 20 years now, and an animal husbandry pro for 10 years, and if I would advise anything it would be to
take your time. You'll be committing 10 to 15 years (or more) of your life, and more importantly, the dog/s life, to whatever course you decide to take. The reason there are numerous websites committed to JRT rescue? Because too many people made a rash decision to get a dog they expected to act like the one they saw on TV. The same can be said for 1000's of dog rescue operations, including the Humane Society.
Oh...and
thedude...don't give your dog table food.

They have all they need in good quality dog food or dog snacks, and your dog won't pick up habits you have to fuss over - like jumping into a friends lap for snacks. Show you love your dog by not setting them up for failure or nagging. They'll be healthier and happier for it.