I personally rate Raptors very highly. People say they're expensive, but they cost less points per model than any of the Cult Marines bar Noise Marines and move 12" a turn. They cost a bit more than Loyalist equivalents, but only Blood Angels are able to give their jump infantry melta weaponry. Also since Raptors can take an Icon you can kit them out to fight how you want. They can either hit fast with the Icon of Slaanesh or hit hard with the Icon of Khorne. Either one compliments a unit of Berserkers nicely. If you're worried that the Raptors will get blown off the battlefield early on, consider the Icon of Nurgle despite its heavy point cost.