@chestrockwell – you can play about with the customisation options on the website when you ‘buy’ the bike.
Choose the build spec you want, select buy now & you can then choose ‘view customise options’.
I think the wheel upgrade was £170 over the Nova wheels – you can also choose whether to go for 650b or 700c wheels. You can swap from 700c Nova wheels to the 650b Nova wheels for no cost.
My ‘upgrades’ were as follows:
wheel upgrade to Alpha
swapped the saddle to the Kura as it looked more like the normal saddles I find comfortable.
Tubeless prep & upgrade
and I also swapped the FSA crank that comes as standard on the GRX1 build, to a SRAM Rival (I did this by e-mail). I am not sure if this was strictly necessary, but looking about it seemed like there were more options for aftermarket chainrings with the SRAM option.
I have to say, it wouldn’t have been that much more expensive to go for the AXS XPLR build and I did consider going for that. One of the things that put me off though, was that replacement 12-speed cassettes seem to be a lot more expensive than 11-speed. I’ll probably regret that, but was trying to be sensible.
As you mention – it comes with the Alpha wheels, so if you are upgrading those anyway you are already reducing any cost difference by £170.