I'm in the same boat as you, Premium subscriber to Spotify (great for the kids, incidental music at gigs, new stuff) but I've also uploaded my entire collection to Google Music. I have heard said that Google will be releasing a streaming service in the near future, now if that integrates with what I already have uploaded (which fills those beatles/led Zep/pink floyd holes) then I'll kick Spotify into touch, I'm so far into bed with Google these days anyway we refer to each other as darling.