Holy crap, Christopher is right - you've got some great chops there! I'm jealous! :-). You've got some great tools to work with, that's for sure!

Christopher's tutorials are very good. Anders has some good ones on phrasing too. Anders focuses on a blues context, but the concepts still apply to any style of improvisation.

I'm in a similar situation as yours, though my chops aren't where yours are yet. I've been focusing on phrasing and it's been quite rewarding. I'm finding that speed is coming along for the ride without even focusing on it. Focusing on phrasing may not be as boring as you might think.

Something I've been doing that has been helping me is listening to the players I like and admire with a critical ear - mostly Jimmy Page and Joe Bonamassa at the moment. I listen to their solos and think about what Christopher and Anders have to say in their phrasing tutorials. I also try to analyze what about the solo that appeals to me and makes it "cool". It gives me context to work with.

You might also want to check out the song library here and learn some songs from beginning to end. Improvising is cool and fun, but it's great to be able to play something that other people can recognize.