Thanks Jose. This kit was one of the options. Do you know if once I have the library, if I found a positive clone, can I mobilize this fosmid to another bacterial host, insted of the Ecoli EPI300?
Fosmid kit is certainly the easiest & fastest. Mobilizing it into another host, that's exactly its weak spot. Therefore, for "best", look at the IncP, IncQ origins. I don't think a "kit" exists for those. So, if I were you, I would probably start learning how to do everything with the kit, and then transition to manual construction of a broad host range system later.