We have been thinking about this one for a while now and finally decided to take the plunge when the one we were looking at, dropped £20 off its price in the January sale! We chose a BT8610.
Yes, we know that cordless phones don't work in a power cut due to their base stations not having their own electricity supply (design rethink to allow a battery?). Also, during a power cut, despite the handset having batteries, the date and time have to be reset - again, very odd. We are keeping the old one for a power cut, just in case.
Until we took advantage of BT's nuisance call service (free as we are their customers), we were receiving up to 15 calls a week. We managed to block them and also don't allow witheld or international calls through at all. However, once your limit of 100 blocks is reached, you are stuffed unless you pay, or else have to physically remove some.
Our new phone has Truecall technology on it. Meaning when anyone except your allowed contacts get in touch, the phone answers (like an operator) and people have to give their name. It then rings us and plays the message. If we don't want to accept we push the refuse button or block them - simples.
Most cold calling agencies aren't happy to leave their name from what I can gather when said 'operator' kicks in unless they are from say the hospital, who use odd numbers, or an official company such as HMRC etc.
Should someone get a new mobile or landline, they too will have to go through this vetting procedure until we add them to our contact list. This new phone also allows us to block 1000 numbers.
Being wireless it has a small amount of interference on it but also can be used handless (speaker phone), which we may use if said mild interference becomes annoying.