need help choosing qev

[urgle the danish cow]

as title states.
i want a clean 1/4 qev for new project. i like the cleaness of the first two ones but ive never seen it used. which should i get

http://cgi.ebay.com/G1-4-Pipe-Pneumatic ... 35b37b7884

or

http://cgi.ebay.com/Pneumatic-Quick-Exh ... 3ca1f78e9c

or

http://cgi.ebay.com/Pneumatic-1-4PT-2-W ... 3a674ab0f0

[Gun Freak]

I've seen the first two types being used but I'm not sure how they compare with the power of the European style qev (third one).