Help with London...

[slinky]

Hey there... I am making my first trip out of the US in a few weeks when I visit London and Edinburgh for a few days each and I need some help figuring out places to visit in my short time abroad.

I am looking for some places to shop for records (mostly techno/house/dance choons) in the London area. I heard about Phonica and Rough Trade, but any other suggestions?

I also plan on visiting The End to see Groove Armada (dj) and Elite Force on April 15 and Fabric on the 21st to see Evil Nine. I suppose I should buy my tickets in advance so I don't miss my opportunity, but when is a good time to show up to avoid lines? I am travelling with 2 women if that will make a difference for me getting in (to the clubs that is). I am from Minneapolis... everything starts and ends earlier here.

Thanks!