Just downloaded my latest shoot, and have been shooting RAW for quite a while now...lo and behold, bloody hard drive is nearly full!...that snuck up on me....going have to go through and have a hard cull until I get my upgrade sorted out. Problem is I am a bit of an image hoarder.

Question is, how big a hard drive to go for...1TB enough?
and how does everyone decide which images to get rid of... as you download them or fairly quickly once you have sorted through them in Bridge/LR etc?