I decided to keep the winter tires on the OEM rims and buy new rims and tires for the summer. After reading a lot on lotustalk.com I went for the Team Dynamics Pro 1.2 rims and A048 tires from Yokohama. My first experience is that there is a lot of grip and the steering is somewhat heavier. Also noticeable is the rolling resistance which is higher and resulting in a 5% less range.
Front: Team Dynamics pro 1.2 part number 5M2-67030BL
Pro Race 1.2 Black Matt 898 RFBlk 7.0×16 e30 4×100-56.7
Rear: Team Dynamics pro 1.2 part number 5M2-77536BL
Pro Race 1.2 Black Matt 898 1.2 RFBlk 7.5×17 e36 4×100-56.7
Front: 195/50 VR16 84W Yokohama A048 LTS
Rear: 225/45 WR17 TL90W Yokohama A048 LTS