Getting loops/samples
Where is a good place to start building up a good library of drum samples mainly for electro/house/dance music. So kicks, snares etc?
I personally buy my stuff from loopmasters as they seem to be pretty decent for what i use.
Sounds to Sample also make really good loop/sample packs. And lately Cluster Sounds has really caught my attention as well
Vengeance packs and Deadmau5 xfer are both amazing. I have a few other random ones but those two are the best by far. By the way DO NOT WASTE YOUR MONEY ON BATTERY 3 LIKE I DID. Just helping a brother out 
Best VSTs = Massive and Sylenth1
+1 for Loopmasters. They have DJ mixtools packs, that are reasonably priced.
You should check out Loopbased.com as well.