I think Ox is the better player between the 2 but I see him more as a midfielder rather than an out and out striker.
I agree with giving Giroud time but I don't see Gervinho as a long term solution and if he goes to the ACN we really only have Giroud as a striker. Gervinho in the absence of Walcott might be our best or truest wide player. All others seem players who prefer the center but have been "converted" by Wenger to the wings.
I definitely hope Cazorla will become a bit of a goal threat in the mold of Lampard and that Podolski won't be a short term wonder in his little scoring binge.