I have been with Vivaciti and I am now with Xilo (both through C&W).
Xilo - £17.24 (£14.99+VAT)
Viva - £21.85
I can definitely recommend Xilo out of the two after being with both of them, support with their ticket system is second to none, normally get a response within 30 mins.
Its the Pro 16 H package
here.
They provide all you ask for:
Uncapped ADSL 2+
No FUP
AUP
Bandwidth Limitations
Traffic Management
And have the ability to change interleaving / Fast Path
I also recently requested to get my line modulation changed from ADSL2+ to ADSL2 due to my long line, they replied within half an hour and had actioned it with C&W at the exchange within 2 hours, great

.
Although it states on their website up to 16mb, it will go as fast as the exchange allows, which in my case is up to 24mb, although that doesn't help when you 4.5km from it!
Any questions you've got ask them with their sales chat facility on their webpage.
Hope this helps!
Edited by deleted (Fri 04-Sep-09 09:22:40)