GET ONE! YOU'LL BE GLAD YOU DID!
I totally LOVE my 919, and wouldn't trade 'er in on anything if the world was ending! (Oh, it is? Thanks for the update!)
Seriously, you'll LOVE the 919, and you shouldn't have any problems. And I wouldn't judge your love for the 919 on your riding experience or skill level. As long as you get a feel for the torque it has for such a light bike, you won't need to wear Depends to work when you commute! Just like someone else mentioned already, go easy on the throttle because she IS a freakin' scarey bike in the first couple gears until you get used to the lightness. Among the bigger bikes I've owned have been a KZ-900, KZ-650, GS-750, and Nighthawk 750 plus other smaller bikes over the years. The scariest of these was the 82 GS-750 because of the 16 valve engine. With triple discs and alloy wheels and no kickstart, it STILL weighed in at over 500lbs dry! BUT, it would wheelie if you weren't careful, and when it hit 5,000 rpm all hell broke loose (and it was carbed)! Yep, at 5,000 it was like hitting a nitrous button!
But, the 919 has MUCH more horsepower and torque, fuel injection, 16 valves, very light for its size, and will scare the hell out of you if you're not careful with the throttle. I'm almost 51 (no comment, barton664, you old fart!) and have been riding since I was in 5th grade. Almost all street bikes. But of all the bikes I've rode, mine or a friend's, THE 919 IS THE SCARIEST.
Don't get me wrong though. I'm not saying it's too much bike for you! In fact, you'll love it. It should fit your needs fine. Commuting? No problem. Hey, you'll just get there quicker! Long rides? Well, you'll hate the hard seat until you get used to it.
My only issue is $4000 for an '02 seems a bit steep. Just my opinion. If you're gonna spend that much for a bike that old, you might keep shopping. You're sure to find a NEWER 919 for less!