First, Welcome!
Tire Rack shows 20 tire options in that size.
225/50-18 tires at Tire Rack
Can't tell from your post if you did or didn't like the Yokos and if your trying to get something different out of your next set or trying to match them.
Looks like the Yoko's are the most expensive choice on that list, but if they worked well for you why not go with them again?
If you want to go a different route this time, there are reviews for the other tires listed all over the internet.
Personally I like the Yoko's. I moved my stock rear 245s to to front and put 295s on the rear on wider aftermarket rims. Working great for me.