For the record I would pick Howe before Viera and Arteta, personally, both would be a major, major, major gamble, not a single manager we would appoint wouldnt be a gamble, but I would honestly prefer to appoint a manager with more than 6months experience.
Silva im not overly keen on, but I would probably take him before Howe.
Silva doesnt just have a fancy name and wears designer suits, hes got experience of winning trophies in Europe and experience of being in charge of clubs with a big stature.
Howe doesnt have a fancy name and wears trackies, hes done utterly superb at B'mouth and hes still very young, but how would he handle the pressure? He lasted 9 months at Burnley, granted he was younger back then and its a cliche, but managing a team with no expectations is a far bigger job that managing Everton. He would be under more media scrutiny and the fans, my God the fans.
Hes also never won a pot, now again thats unfair cos hes still only 40 and "only" managed Bournemouth, but its gotta be a factor.
We could certainly do worse and I would very interested in him joining a "bigger" club and seeing how he got on, but I would prefer that club NOT be Everton.