about to buy a set of new summer tires for my Z with stockers

I wanted the general exclaim UHP because ive had good results with them and they are priced fairly

but they only have 225-40-18 F
245-40-18 or 245-45-18

so i was wondering if itd be okay or look okay. to ride with them?

any suggestions on any other good tires for a great price?

thanks

 

I could use a calculator such as this

http://www.dakota-truck.net/TIRECALC/tirecalc.html

and post the results. But you are capable of doing it yourself.