If it because its so thirsty on gas, then id go for the GTi, if your doing alot of motorway stuff then get a TDi and try and live with it.Town mpg isnt much in it between say the 170 tdi and GTi, as i have had both.
Shame your sellling, its a gorgeous car. I bet your really gutted.
Price is about right, and with current climate with fuel costs and stuff, prepare for a wait trying to shift it. Last resort is to sell back to a VW dealer.