Let's see pictures of your custom painted Stock Tesla wheels.

[Gixx1300R]

Lip is the same color as the car and the spokes are gunmetal?

Correct

 

[Zuikkis]

Very nice! Planning to do the same this summer for my Silver MS. What size/brand tires did you go with?

I have 245/40-20 front and 275/40-20 rear. That pretty much matches the stock staggered 21" diameters.

I went for Nexen N'Fera SU1. It's a cheap (korean) brand, but has gotten some reasonably good reviews. SU1 is not the best from them, though, they have N'Fera Sport for example..

I ordered them online from Autodoc. Full set of four tires was only 450€ delivered, and then maybe 40€ to get them fitted at the local shop. That is an absolute bargain for a 20" tire set.

2014 Auto Bild Top 15 Summer Tyre Test - Tyre Tests and Reviews @ Tyre Reviews

A bit old test but gives you an idea. Also Nexen was the quietest tire of the test, which is quite important factor for me.