Any manager we appoint would be a gamble -
Rangnick - never worked in this country
AVB - not succeeded in this country
Hughton - had a half season in the premier league got sacked
Holloway - One season resulting in relegation from the premier league
Appleton, Mcinnes - Got less than 6 months of been managers in this country
Clarke - never been a manager
All the above have been linked with us and i personally feel all could do a good job, however they all are a gamble, we struck gold with Roy with the timing but other than that our appointments tend to be gambles and they usually pay off, we arent going to get Fergie, Redknapp, Moyes, Jol, Mancini, Wenger, ONeill etc to the Albion and they are the only proven managers in the Premiership.
Rodgers and Lambert both have potential to be great managers (and i think they will do well in the new jobs) but at this stage they have only had one season in the Prem, that dont make you proven, also the clubs they have gone to are bigger than us and pay better than us so we didnt have a chance of getting them.
The only other proven manager was Martinez but it would appear that Liverpool and Villa couldnt get him so you have to say he was out of our league, whether we like it or not.
90% of the appointments and signings we make are gambles, they have to be but most have a point to prove and usually succeed.