I migrated from an ER6f to one of these (as have others I know), the ER6f is a great bike but I wouldn't even consider swapping back.
I got the nose bit, a taller screen and some engine bars straight away and she already came with handguards.
I picked up a Corbin seat thinking it would be more comfortable but being a short arse and seat being made to American proportions if I sat in the 'bucket' part of the seat then I couldn't reach the bars and if I sat more forward which was my normal place on the seat the Corbin is wider which meant the ground was further away - Doh!