You could definitely use Edge, don't know if I'd pay the price they ask for it though. With most of the name brands we are used to hearing about, you are paying for nothing more than the name, their sponsorships and their advertising costs. The oil in the carton is very often not as good as a cheaper alternative. Mobil 1 is probably the best example of this, a decidedly average product thats hyped up to be some sort of super lubricant.
This makes interesting reading:
http://www.animegame.com/cars/Oil Tests.pdf
I personally use Fuchs oils as I know whats in them and I know how well they work. We use them in our "work vehicles"
and if it does a good job in those sort of conditions, it'll do well in anything. Unipart's own brand semi-synthetic oil is the same as Fuchs Titan, their fully synth oil is Fuchs Supersyn. I pay about £14 for 5 litres.