Stepping back for a moment and considering Tony's choices, if it were me, I think I'd trust Sil the most. Christopher has it in him but is too hot headed, and Paulie too seems quick to the draw so to speak, and not all that bright. Vito, I don't know. Sil seems the most loyal. Then again, he is consigliere.
I don't think Tony will be down and out that long though. I have a feeling we'll see him in the hospital next episode, but up and about the following. Just a hunch.

Then again, I could be totally wrong, since this show tends to surprise me. :p
TIS