Yagon
I cant vouch for the Celestron Nexstar 4GT over others as I'm a newbie also. But it seems to fit your budget and scope. I am also coping with light pollution in Menai but for size, ease and speed of set up you cant go to wrong. The tracking is not fantastic but for your money at least you have some, with a compterised goto database to boot. Take a look at the link below.
P.S. these are selling in the Australian Geographic shops at the moment. Or were.
http://www.celestron.com/prod_pgs/tel/nx4gt.htm
Good luck
Barry