I started out with a 345 and ended up with a 335 for additional movement.
My opinion was based on him "scraping" together the money. I think Chris made a great point, you need to make room for a 275mm minimum up front if you mini tub as well which adds to the equation. I think it's important to be happy with what you can afford, NOW. Get the car on the road and enjoy it. Contrary to common belief, it is more fun to USE the car.