Some power forward winger comps:
Hagel - 26 gls, 75 pts, +11 Off, +3 Def, $9.4 mill Dom value, 1% HP D+3 star%
Kempe - 30 gls, 80 pts, +10 Off, +1 Def, $8.0 mill , 0%
Vilardi - 38 gls, 63 pts, +9 Off, -3 Def, $6.3 mll, 43%
Marchment - 22 gls, 54 pts, +4 Off, +2 Def, $5.8 mill, 0%
Bertuzzi - 21 gls, 43 pts, +5 Off, +0 Def, $5.6 mill, 0%
Crouse - 23 gls, 43 pts, +0 Off, +0 Def, $3.6 mill, 2%
Knies, 15 gls, 36 pts, -1 Off, +0 Off, $3.6 mill, 2%
Its all about what you think his upside is. If you sign the big deal (6 x$5-6 ish) you are betting him becoming a legit top line forward for there to be good value there. Otherwise the better value is on shorter term deals probably.