Hi - I'm looking for recommendations for a braided main line, it will be used mostly abroad and willl be either used from a boat or bait boat, at distance 200m+ not sure about the pro's & con's of sinking v floating, so looking for enlightement from you guys...

At that sort of range I would use something neutral like PowerPro. At shorter range and without weed I would use a sinking braid such as Gardner Hydrosink.