dohoon

hi, i am buying a IS 250 AWD for my girl and wanted to know if i am getting a good deal or not. it is 2006 IS 250 AWD with Lux package and Nav. i got down to 1500 over invoice which is around 36.8 or so. what do you guys think? i could also get a 350 for 1500 over but she is afraid to drive in snow so... also, are there any changes to 2007 IS 250/350? tia