Thanks, I updated the link...
What did you think of the 18x50's?
I initially bought the 12x36's and then figured maybe the larger objective, 20% increase in magnification, tripod mount and UD lenses would yield a significant improvement; that coupled with the views on
http://www.cloudynights.com made me go with the 15x50's.
If I had known there was so little difference in magnification between the 12x36's and the 15x50's I may have opted for the 18x50's.
I guess at some stage I'll put the 12x36's on eBay, as the wife has shown 0 interest.