I'd agree, if you like the Widow Maker then the UL would be a nice compliment.
But have you seen the reviews on Will's Sabre here? http://www.gwtwforum.com/index.php?topic=2729.0
He estimates the Standard can fly easily in 5 mph and down to 3 mph with work, if that's with the 30 grams of bolts or so he recommends to use I would think the UL would go pretty low.
The reviews are good and the price is excellent, I don't think you'd be making a bad choice to go with a Sabre, and since Will just invested in a new sewing machine the already good quality may be even better. Go for it.