Thx kipper. Can you rate these campaigns in order of interest to you?
1) Great Pendragon campaign, 480 AD to 565 AD (15 years of Uther, 15 years of no king, then the arrival of Arthur). Set in Salisbury. This is the hardcore epic sweep campaign. Uses 5th edition.
2) The Boy King.: 505 - 530. Very heavily military focus. Battles almost every year (pre-Arthur, Arthur unification, Arthur vs Saxons, Arthur vs Picts, Arthur vs Romans, Arthur vs Irish). Merlin disappear, Courts of Love established, foundation of Round Table. Players come from Cameliard. Get a chance to get close to Arthur before he gets remote and famous. Uses 5th edition and Book of Battle.
3) Age of Chivalry 531 - whenever. Tournaments, Romance, Quests, Magic. Set in Camelot, knights come from all over. This is the King Arthur most people remember from books, stories, films. Uses 3rd edition
4) Pagan Shore. 531 - whenever. Set in post-conquest Ireland, players can play magic users, bards, whatever. Very little Arthurian content at all, will be very strange and challenging. Will be mostly experimental with the DM not having a clue what he is doing. Uses 3rd edition with 4th edition magic rules
My top choice would definitely be #3. I'm a bit unclear as to exactly what #4 entails (and you're probably not to sure yourself since it would be mostly experimental), but it also looks like it could be quite interesting. #2 seems like it would be much more limited, I think I'd prefer more variety.
So my overall voting would go:
3 4 or 1 (I'd probably need some more information about option 4 if it came to a choice between the two) 2