There's also the Smoktech RDA if you're looking for a cheap one.
The Clockworks RDA (where the term RDA originated) is a stellar vape and probably the easiest atomiser to rebuild in the world.
It has a slightly tight draw, and I know vapers in the US seem to like it really loose - I'm fairly sure you can ask him to drill the airhole to your preferred size, or however many airholes you may want.
It's not the best looking atty in the world as it's made from delrin and aluminium, but it's easily one of the best-vaping. He can provide it in brushed, satin, or polished natural, black, silver or purple
Random helpful pic of an iGO-L on a Vamo next to the black anodised RDA on a Vamo:
Added bonus: it fits 20 drops of juice.
Here's his thread on UKVapers, PM him to order/get an estimated time of arrival: there's usually a couple of weeks between batches.
Cost is $54 delivered to your door (using Google's currency converter), $58 if you want it anodised.
Edit: just saw your new post. They seem to have revised the iGO-L somewhat, as most complained abut the loose cap and a tight draw - the one I bought last week has an extremely tight cap and a loose draw.
The RDA has a very, very tight chamber.