Just ordered myself a ET9000 from the site sponsor, can't wait to get it

2 questions.....

1) I'm going to install a internal HDD, what's best to get a 2.5" or 3.5"? if i get a 2.5" do I need an adapter for it? do i get sata or IDE?

2) I want a cooling fan in it as its tighter than a frogs a**e in my tv cabinet, can i get the fan and J11 connector from maplins?

cheers