SR4 Classic purchased – looking at strings

I finally did it. I purchased a classic today and will have it next week. While I eagerly wait for this thing I am contemplating going with flats…but don’t want to sacrifice that growly tone. I’ve never tried the cobalt flats and know they are highly recommended so I may go that route. I may go rounds though idk. The tone im kinda going for would be similar to what you hear on roundabout by yes…I know that’s a Ric and all..but I think rounds get me close. Can flats?