Feedback requested: Enkei RPF1 & Yokohama S.drive

[Iggy888]

Hello everyone. Last winter I broke down and bought some dedicated Winter tires for my stock steelies. Now that winter has passed, I am looking to get some new wheels and tires for the summer.

I was thinking about ordering the following from tirerack.com:

Wheels: Enkei Racing RPF1 Bright Silver Paint
Size: 15x7
Offset: 41mm

Tires: Yokohama S.drive (Ultra High Performance Summer)
Size: 195/55 R15

My Yaris is my daily driver. I don't have any immediate plans to autocross it. I don't do much spirited driving but would like to improve the fun factor of the car a little bit by taking turns a little faster. I am currently running stock suspension but may lower the car (light drop) somewhere down the road.

Concerns:
Are 195 wheels too narrow for a 7 inch rim? I was concerned that a 205 or higher might hurt fuel economy.
Are these lighter racing wheels okay for a daily driver?

I thought this lighter combination might give a very mild boost to acceleration and braking but have neutral impact on fuel economy (slightly wider tire neutralizing any benefits gained by slightly lighter weight).

Any feedback would be greatly appreciated as I would like to replace the winter wheels/tires asap. Thanks.