Not sure if we're allowed to link threads in other forums, but there's a guy named Russdawg on AVS that owned a 990 and sold it as soon as he heard the AVR300.

"If I hadn't bought an Anthem MCA 50 only weeks earlier I would have bought this receiver on the spot and called it a day. Instead I ditched my Outlaw 990 as I stated in my above post and bought the Arcam 700 pre/pro."

That's the first direct comparison that I have seen. I'll encourage him to post more detailed observations here.

Chris