No, no and no. Nobody even knows where Perry will end up after this season, while we know on the other hand that Cally and Yakupov will likely both be top 15-20 consistently in your league. The 2 for 1 is BAD for you in this case.

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12 team Full Dynasty w cap. 13F, 7D, 2G, 5B.
G 4.25, A 2.75, PPP 1.5, SHP 3, Hits 0.4, Blocks 0.5, PIM 0.25, DFP 1
W 5 OTL 1 SO 6 SV 0.25 L-1 GS 1

F:Stamkos, C Stew, R Johansen, B Dubinsky, Max Pac, Umberger, B Ryan, D Backes, T Ruutu, Lucic, Ott, MSL, Heatley, C Kunitz, J Benn, L Adam

D: C Fowler, Kronwall, A Goligoski, JM Liles, M Giordano, K Letang, N Nikitin, R Josi

G: J Quick, A Niemi, C Anderson, Rinne

Two top 6 forwards for 1 who is unpredictable. Keep what you have. On upside alone, I'd rather gamble on Yak's unknown than Perry's and Cally's production is more consistent in what he will do - put up respectable numbers in your peripherals and give you some points - than Perry. That's not to say Cally does it at a higher level.

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League: Yahoo 20 Team Dynasty, H2H (4C, 8W, 6D, 1G)
Cats: +/-, FOW, A, G, GWG, PPP, SHP, SOG, S, SPct, W, GAA

C: Benn,Kopitar,J.Staal,Strome
W: Atkinson,Bennett,BrunnerConacher
Huberdeau,Kessel,Seguin,Selanne
D: Beaulieu,DeKeyser,Despres,D.Hamilton,Leopold,Salo
G: J.Howard
Bench: Braun,B.Flynn,B.Gordon - J.Bernier,O.Pavelec,V.Stalberg
Prospects: Andrighetto,V.Arvidsson,Filatov,G.Carey,K.Flanagan,Kabanov,Lehtera,Omark,Ritchie,
R.Schwartz,Shalunov,Stransky,
Clendening,Deslauriers,Gauthier-Leduc,J.Morrow,R.Murphy,Petrovic,Reilly, -- M.Hackett