Tough break... It is exactly this situation I try to keep people from getting into when they ask something like "Loaded IS250 or Base IS350" and I tend to reply with "Wait until you can afford a loaded IS350"

The down side now is that not only do you have to decide if the extra cost of the 350 is worth it, but you also have to factor in the loss from trading in, or probably even selling your 250. In a situation like this, I would say that if you "think" you can afford it, then it is probably not worth it, keep the 250... If you KNOW you can afford it and funds are a non-issue, then go for it.

In the end, it's just a car and no matter how "nice" it is, there will always be something newer and better in the not too distant future.

 

If you can do it w/out chaning your lifestyle and the moneys not comming out of your next meal then go for it. If you cant and will need to penny count then stick with the 250.