im selling my big manta ray to my brother and getting the pci one.
i have only seen 1 ethernet one in the uk bu the bt line doesnt accept ethernet directly it uses a small rj-11 plug like normal phone line. a router would be good if you have more than one machine though.
the pipex deal is the cheapest out there also , ive had dsl for nearlly 2 years it cost £40 a month back then!
i think the pci one will be tidier if you dont have desk space .
good luck