I clocked in for 45 minutes myself this morning. We've also got a Precor, but it's not the same model you have. We (my wife and I) also have a recumbent bike, which I use to warm up my knees for the first 15 minutes.
The Precor has been great. I vary the speed and incline all throughout my 30-45 minutes and it's never given us problems - and I'm 240 pounds.
A little ECA, a little Sportscenter, and the 45 minutes flies by. Congrats on the purchase . . .