Try the Europe 1200 mod. It's still in Beta but has a LOT of promise and the map is absolutely HORRIFICALLY huge (and it's only about half done) with more castles, villages, and towns than you can shake a stick at, and more lords and factions than you know what to do with (did I mention that all this is in BETA, meaning it's only about HALF done?). It also has a lot of new features: completely revamped recruiting with MANY options for your army composition, knightly tournament circuits where you can join a prominent team, Unique/one-time-only quests.... Link below, trust me you won't regret it.
http://forums.taleworlds.com/index.php/board,132.0.html