I've had a silver Touring model for a year and half now. The engine is technically 287hp.
The ride is bumpy but that's the sports car suspension. Overall I absolutely love mine. It turns heads and it goes fast. It also has more cargo room than I thought. Still not much, but the only thing you should be hauling in it is butt, anyway.
Visibility is limited but I quickly adapted to new routines. I'm 6' and I can see out of the back pretty well. If I really need to see more, say backing up, I just duck my head down about 3". The blind spots on the sides are larger than normal but you just have to lean in to the driver's side window and check them out. Overall they've been minor adjustments for a great car, IMHO.
Here are two issues you should be aware of, though:
1) Tire Feathering - the inside of the front tires gets this around 9,000 miles or so. It basically makes the tires 'roar' when you're slowing down. I didn't notice because I bought mine with 9200 miles on it so it was always there. When I had them replaced it was much quiter. Now this isn't an all the time noise, just when you're slowing down. It's also not deafening but noticable.
At first Nissan denied it. Then they started giving us new tires for free. Supposedly it's an alignment issue, but the last I read it was something a little more. They were supposed to have a fix out for it soon. I need to check the Z forums
(and you should too). Do a search for Tire Feathering.
This is a big problem and I wouldn't blame you if it scared you off. Just ask the dealer about it and watch them squirm.
2) Don't bother with the Bose stereo. In addition to being overpriced, the system in the Zs sucks and blows. It's not worth the extra money at all. Bose has even admitted it and sent out placating e-mails to everyone. I finally had my system replaced last month with an aftermarket one. It sounds incredibly better.
Even though I was miffed at those two points, if I had to do it again I would definitely buy this car. It's been a blast. I'll probably own it for another 3 or 4 years and, considering how affordable it is with this monster engine, one or two front tire changes in that time isn't going to kill me.