+1
Upgrading components before barely trying out the original ones means you'll never know if the expense was worth it. For example, the original tires on my bike gave me no confidence in corners and they wore out quickly. I changed to Continentals and immediately felt much, much more confident in corners, so it's easy to see that it was a smart "investment". Same with the wheels. I bought a 2013 Trek Madone 3.1, and pretty much every review mentioned it was a great bike that was let down by it's less than ideal wheelset. I rode it 2 years however before finally buying better wheels, and I can now see what they meant. If I'm being totally honest though, for my level of riding, the wheels were okay, but I wanted to customize my bike, so I got a better looking bike (to me) as well as better handling.

As mentioned though, ride it for a while and if anything, that will give you the order of priorities.