Thanks for the info. It sounds like the 2wire is the way to go.
Or an unused Billion 7800 (the version without the dodgy wireless card.) I was tempted to buy one from a seller on ebay (buy-it-now or best offer) but the seller was wrongly describing it as a 7800N - hence the sale was best avoided.
However I did get a new 7800N from another seller cheaply (best offer) disabled WLAN and it is performing well on ADSL2+ with a downstream attenuation of 37.5dB
