As has been said, it all depends on the role the strings will be playing in the track.
I wouldn't say that the VSL strings sound "flat", I'd say they sound "honest". If you need a "hyped" sound, you'll need to create it. Better that, than trying to tame a sound that's already "hyped".
If you want something more aggressive, try a fairly narrow boost around 7k. Give or take a few Hz. This will generally bring out the bow or "rosin" sound. Think George Martin's Beatles strings.
And like linuxuser mentioned, pulling down the mids will smooth the strings out, so there's perhaps less "character" to them.
And if you're using them in a pop or rock track, you'll probably need to pull some low end out, to make room for the bass guitar and kick drum. A gentle boost a 10k to 12k can help add some "air".
Beyond that, each song and the desired effect calls for a different approach. I know you know that, but it can't be said enough...