I'd rather get the SL5 and put the $1k towards some even better wheels - I'd see if the shop would be willing to discount a set of Bontrager Aeolus Pro 5s purchased at the same time. If not, I'd look at some HED or Reynolds. In any event, you'll end up with better wheels and you'll have the stock wheels as spares (put some 35mm tires on it for gravel or winter riding).