Morientes is tad bit slow for my liking to partner Del Piero, IMO. But I do like him a lot. He is far superior to Trezeguet in terms of technique and smartness. Nonetheless, there is no way Morientes is cheaper than Zlatan, Gilardino or even Vieri for that matter, after his good showing in CL. Furthermore at 28 he is already at his peak, and considering that we should be rebuilding the team, hence lower chances of winning Serie A at this very moment, I do not think he fits into our current situation very well.
I'll take chances on Gila, Cavenaghi, Luis Fabiano or even Zlatan whom I am not very fond of. As for Vieri, it could become anus horribles.