For multitasking the Quad core will perform better than the Dual core and doing animation with 3D is a demanding task which will take full advantage of the Quad core. If latter you want to improve on that performance you could add DDR2 1066 RAM and start looking into OCing, my Q6600 is running at 3.2ghz now and with 2 units of
F@H 1 CPU and 1 GPU it must be stable to do this.
what goes around comes around
(RIG)GA-EP45-UD3P, Q9550 @ 3.5 ghz, CM's V8, HD2600XT512mb 128bit, 4gigs OCZ 1066 ddr2, Seagate sata 120 gig & a 320 gig, 2 Liteon sata DVD Burner, My DIY Case, Corsair 550watt PSU, 2ea 19" LCD monitors.