Re: Magazine subscription
Computer music magazine does exactly what it says on the cover and therefore might be a bit limited and boring after a while for a man of your varying musical interests. Sound on Sound will give you a lot more general reading in all areas of music/audio production but may also bore you with stuff that at first doesn't interest you. (those articles are great to come back to though.)
If you're not sure though then just buy both for a couple of months and see what you get on with best.