If you want the best feedback and control which almost always results in faster lap times on track, more precision which carving up a canyon, etc the almost always best to stick with a 205 on an 8" wheel in the ultimate grip summer only tires. As mentioned above the 195 BFG is super wide for a the sidewall markings and works really well on an 8" wheel. If you need an AS(really 3 season tire) the NeoGen in 205/5015 is a dang good tire on an 8.
If you simply must run a 225 (always look up the real specs of any tire you are interested in as sidewall markings and size listings are most often quite inaccurate) get the narrowest 225 you can in the type of tire you want to run as it is best to have a little stretch, not much needed, it adds greatly to the feedback and control which you give up a bit when going down to smaller width wheels.
Let us know a bit more and we can better assist you in choosing the best tires for your needs.
1) stock power, moderate upgrade, hybrid turbo, big turbo, etc
2) use, autocross, road race tracks, mountain and canyon runs, just street, combination of uses...
3) stock or upgraded suspension and what type if so
4) general budget range
5) wheels, offset, etc
6) summer only max grip, summer only really good grip but last longer, 3 season(max grip summer tires are generally not to be used in freezing temps and can lose a lot of grip below 50 degrees)
Welcome to the 15" wheel club, a very wise mod on this car, 16's very good as well but not much available.
Rick