Yamaha CG201s optimal strings and internal bracing type

[Lorilee]

I just purchased a Yamaha CG201S. It was manufactured in 2008, and it still looks beautiful. Sounds great, too. Anyway, it needs new strings, so I was wondering what tension/type strings would be best. I know very little about classical guitars since I have only played steel string acoustics. I do know that there is no truss rod, and the strings keep the neck properly aligned. Therefore, I need to know which strings to use. Anyone out there have any ideas? Also, what type of internal bracing pattern does it have?