When you say slip is this because of the road surface?
Just thinking it might be better to go for a decent sport touring tyre like the BT023 or the new T30. "Stickier" tyres, in the extreme, tend to be stickier only when they are hot and up to operating temperature. If you have slippery conditions and cool weather they will be worse than a "touring" tyre. My GSXR came with Metzler K3s a "sticky" tyre but crap in cold and wet conditions. Also a Fazer 600 as standard doesn't have enough ride height to get much lean angle to trouble a sticky tyre.
On my Fazer I really liked Metzeler Z6 or Michelin PR2 (this was a couple of years ago before the PR3 and Z8 came out). I've run the M5 on the GSXR1000 in all weathers found them predictable but a bit wooden - no issues but not confidence inspiring either. I've changed to BT023 this winter and found them more communicative (appreciate this is purely subjective!) but far slower steering than the M5, the bars need a lot more weight to turn and feels as it steering through treacle.
When the BT023 go (I'm too tight to change tyres with tread) I will try the T30 as they are meant to be faster steering.
Bridgestone T30:
http://www.bridgestonemotorsport.com/championships/other/news/2863/bridgestone_launches_battlax_sport_touring_t30_motorcycle_tyre__and_puts_the_pleasure_back_in_touring