In general I find the best business class seat to be reverse herringbone like that offered by Cathay Pacific, American (and US Airways), Delta (on not enough routes), and EVA Airways. You get both privacy and comfort with all-aisle access.
There’s a new concept from B/E Aerospace, not yet installed in any aircraft, that’s certainly interesting — that it’s too limiting when you try to manage all functions through just the seat. There’s greater adjustments possible for more uses.