Xilo/uno are not shown separately on this site because only ISPs with their own connections to BT Wholesale are listed, unless they are LLU.
They are resellers of a few wholesalers, with a well-designed product portfolio. You will rarely see anything but rave reviews of them here. The owner is also very active and helpful on these forums, not just to promote his products. Obviously helping people that way is bound to be good PR
I frequently suggest them to enquirers, but because you had narrowed it down to two good ones I thought adding IDNet was sufficient, as those three are in effect direct competitors.
If you want to see more about xilo/uno have a browse of the Resellers forum
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