Thanks for the comments. I've finally received the long awaited updated noise data for the Proven 35-2, but it only knocks a couple of dB off the previous figures. So still too noisy for my site.

Unfortunately we've had another blow in that an application has gone in for two 800kW turbines right next to us. If these go ahead then they'll "max out" the noise over the entire neighbourhood. The last application in this area took over two years to be determined so we are absolutely stalled for the foreseeable future,

This application is from one of the most hard-nosed developers around here, and an unfortunate side effect of the way he goes about his business is that it has turned virtually the whole local community against wind turbines of any sort.
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aesmith