I play raven guard. When you know how to play with them properly (i'm about halfway there), they can be a lot of fun. Shrike is very nasty in close combat with those claws.
Suggestions for if you're gonna do raven guard: scouts (the telion model may be a good idea as well - he's helped my scouts out quite often), lots of drop pods, and maybe too many assault marines! You could even put jump pack-less assault marines in the pods!