In reply to thedatastream: Agreed. Raeburn's Easy Route felt pretty hard last year when I tried it during a thaw. No gear in 50 m across a traverse and no belay at the top of the first pitch! I was out with two novices so chose to reverse it all rather than belay off a very crappy buried axe - not fun. I got a few screws in but they were for comedy value only.
I'd also second the thing about Castle Ridge being tough under powder - I did it recently and found the bit to get into the chimney pretty desperate (mantle onto a powdery featureless slab) and the top of the route was quite time consuming.
If the gullies are okay avalanche-wise, I thought North Gully (II) was excellent, and Number 2 Gully (II) very good, though a notch harder as we had trouble finding any rock gear at all.