Here are some vids of mine flying on a weak 140L just to give you an idea. Its still a wicked plane with the 140L and very capable, but may leave you wanting a little more power once you start to get to grips with it.
http://rcgroups.com/gallery/data/500...emusicrcme.wmv
http://rcgroups.com/gallery/data/500/47154c140movie.wmv