Great car, I had a 2006 and it was also great.  I would suggest this car, it is a great value for the money.  Performance is fantastic, ride is smooth but not too smooth that you don't feel like you are not driving.  There is plenty of room for 2 car seats in the rear too.

Rating: I did not give it 5 stars or the highest rating in all categories because there is not perfect car.  There is always room for improvement.  

After visiting every dealership in North Jersey this round came down to an Infiniti G35x and Mercedes C300 Sport 4Matic.  I really liked the C300 but there were a few things that turned me off.  First was the attitude of Mercedes (Prestige Rt17 Paramus) .  I purposely went shopping in a pare of shorts t-shirt and a hat.  It is very interesting to see the different responses dealerships and the people the work in them give.  

The attitude of Mercedes is, we are the best, you should bow down and kiss our feet to drive our cars.  We will sell you whatever is on our lot and not go out of our way to accommodate you.  Maybe this is the reason people continue to go to other manufacturers.  Beside a good friend that used to work there told me not to buy one due to the mechanical problems.  I would still like to, and will own one some day.

The G35x seemed to offer more standard features and hoarsepower over the C300 and a lot less attitude.  Made the final deal over the phone at Ramsey Infiniti and picked it up the next day.

So far so good.  Have had it about a month.  It costs a lot less than the Tahoe gas guzzler I turned in.  I only have to fill it up once a week at a cost of around 60-70 bucks.  Still down 40-50 over the tahoe.

At first I hated it.  I thought it was stiff and felt everything. Now that is has broken in a bit, I enjoy the way it sticks to the road and corners on rails.  The inside is like a plane cockpit.  Everything is right at your finger-tips.  I have spent the last month loading a few CD's at a time into the built in MusicBox.  At first it was a little confusing, but after playing I have figured it out.  I still have my 60gig ipod hooked up and connectivity with my iPhone is a breeze.

Some improvements would be the ability to load music directly off the compact flash card.

Overall I am very happy.  I will provide an update in the future.

Remember: In ones lifetime you get around 18 opportunities to try different vehicles.  Enjoy the experience and get the one that you want, and well can afford.

Man this car is fast.  And boy does it have grip.  Got my G35x (all wheel drive) in January 2008 with blizzaks and it still performs great.  I upgraded from a 2005 G35x which was nice but much rougher around the edges than this car.  The engine has been improved from 298 to 306 Hp, and the interior quality is superb.  I prefer the rounded edges on this one too.  No problems so far.  I've changed the oil after the break in period and am running full synthetic.  No more change till 10000kms.  The only negative is that the car is a bit thirsty.  With a 68 L tank it cost me almost $90 to fill it the other day.  It runs premium fuel.  That being said, I get more joy out of each litre than I ever did from any vehcile I drove for any length of time in the past (in order: 78 Mercury Grand Marquis Woody Wagon, 86 Ford Tempo, 87 Chevy Camaro, 98 Ford Taurus, 92 GMC Safari, 92 Toyota Tercel, 97 Subaru Outback, 2005 Infiniti G35x).

It's the 2nd car I've ever owned and it's incredible.

Take 306HP, jam it into a rugged tight frame, throw in a six speed with a smooth clutch and predictable oversteer at the limit.  Perfect, and it seats 4 comfortably :-)