Beauty isn't the point
Dave, I've never seen the (allegedly) 2Mw turbine at Reading, but given how little wind blows in the South of England, I would guess it never produces 2Mw and doesn't even come near that for at least 75% of the time. In other words, amazing and majestic it may be, possibly even an engineering marvel, but considered functionally, it's an expensive and pointless piece of gesture politics.
As for the Lewis windfarm, well the wind is a little more prevalent there, but sometimes it blows not at all, and sometimes it blows too strongly (yes, that too is a problem for wind generators), and never ever does it blow predictably and manageably.
This has two consequences - first, you have to keep standby generation of equivalent capacity in an almost-ready state all the time, which pretty much negates the emissions gains, and second it destabilises the power grid, which becomes unmanageable once intermittent and unpredictable generation like wind exceeds about 10% of the installed capacity.
The Scottish Executive has done the right thing this time, though probably for all the wrong reasons.
Scotland currently gets about 40% of its power from its two operating nuclear stations (Hunterston and Torness). Once these go off-stream around 2015 our choices will be (a) build more nuclear or (b) depend on imported Russian gas (like THAT's a good idea - ask the Ukrainians) or (c) import power from our more sensible Southern neighbours in England and/or France or (d) let the lights go out.
Wind is not going to hack it, and it is not worth destroying our finest landscapes in pursuit of a chimera.