Celestron Nexstar or Advanced Series?

I'm about to purchase my first telescope. I've narrowed my search for a new
telescope down to two. Both from Celestron. The 9.25" Nexstar or the 9.25"
Advanced Series. Both have the Starlight XLT coatings. The Nexstar has GPS
but I have a GPS receiver that I can connect to a laptop, so GPS is not
needed. My question is: Is there a vast difference in quality between the
two telescopes? There is a $1000 difference in price so I don't want to
just buy cheap if I'm going to sacrifice quality. But if GPS is all I'm
paying for with the Nexstar then I don't need it anyway. Any advice and
information describing the pros and cons of both would be GREATLY
appreciated.

Thanks!
Tom