First off...Welcome to the club.
Great choice of bike and as the others have said it's virtually indestructable. The big issue isn't the miles covered but how they where covered. A track day or two won't kill your bird (unless you have an off) but a life of trackdays is different. Under normal riding conditions 45000 miles on such a smooth potent bike is nothing to be afraid off so long as the servicing has been done on a regular basis.
Also get a HPI check...well worth the money as it's easy to get new panels onto a bike to make it look like new and this will cover a bent or damaged frame .
Other than that...what're you waiting for...get the bike .. you know you want to