Ssaccheri, regardless of what brand and color you're looking for, be very weight sensitive in your selection.
I bought some 18 inch aftermarket Carrera Lights (someone pictured similar ones above on their car) and mine are anything but light! They look great, but holy cow they're heavy and they significantly slow down the car off the line... and my 2.5 motor's torque just doesn't have a lot of extra room for heavy unsprung weight.
What I like about the Tire Rack rims for our cars is the fact they're not heavy at all, and even a bit lighter than stock twists.
BTW, your rear stock twists are worth a lot of money so don't sell them cheap... the boxster spec boys like to run "square" meaning they run the wider wheels from the back in front too so they can rotate tires and get more tire wear out of a set of rubber. They pay dearly for those rear rims.
Front rims can then be repurposed into hose reels around your house
