To be honest, if you are going to use it as a everyday car, stick with a gtst. They are much more usable for everyday driving. The GTR is great but is wasted on the roads. Thats my opinion. I've got a 32GTR btw. In terms of costs, it shouldn't be too different from a gtst, if its a very clean example. Otherwise, it will cost a arm and a leg.
On a cruise or down at the track, its definately the right car!
I drive mine everyday and would prefer something that is a bit more responsive and comfortable as a everday car. I'm thinking of getting a yaris Its much friendlier on the wallet and you don't have to worry as much when driving around.