Who needs more power than 5 watts? The difference between 1 watt and 100 watts is about 3 S-points. 1 watt is a good starting point for all digi modes. Not more power is the option, but a good antenna (you can build or buy a good one) and good propagation (it's a gift of the sun or nature). That’s all. No more troubles with your neighbours, no RFI and it’s better for our health too. Too much radiation can causes cancer. The main question is, why do they hear me with e.g. 35 watts psk31 and not with 1 watt. I think it has to do with QRM caused by higher power levels of other stations on crowded bands. So, this year I will operate with 1 watt WSPR and several digimodes such as JT65 and JT9. Keep an eye on my WSPR blog and watch my results. This morning I was spotted by several stations from Australia with 1 watt (distance between 15.000 and 16.000 km) on 20 meter. Nice to read: Bert PA1B blog.