Man what I'd do to pay those prices lol. As someone else has said you may get more pertinent advice on the Paintball Nation forum, since most people here are based in the UK. I must point out that the bottle you posted up is a nitrogen tank (N2) and a low pressure one too. For an Etek, planet eclipse recommend a high pressure reg on your bottle to prevent drop-off at high rates of fire (though I use a LP on mine and it works grand at 15bps).