Back to the original posters question, there are several/many great kites out there. The standard advice is to test fly a high end kite before you buy as they all have a little different personality and abilities.
Certainly if you like the Qpro you should try a QP SUL. Having a matched set of a given make/model you like is a good thing.
I have a set of Talons and they are trick monsters and very well built but require a little more wind to power up.
I've heard only great things about Lam's kites and have seen him fly. He has a long record as a great flier who makes excellent kites.
In my bag, Blue Moon and Aerostar make the best kites for my inland wind conditions. The Exile UL is a worthy contender in this category. Sadly Paul no longer makes the Sano. You had asked about a full size kite, the Exile is 7.5 ft and the Sano is a 7fter. The Mantis/Muse is a full 8ft though not quite as tricky as the Exile.
@Rob/Must86 You are wise to keep your Exile Moonie UL stock. Ken's kites fly well right out of the bag and do not need adjusted for most conditions. I like to tweak things to see if I can eek out a little more performance here and there. That's one reason I have two of everything
One tweak you might try: Assemble the Exile and pull the bridle pigtail down towards the LS connector so that the inhaul and upper outhaul are taut. You'll see that the catch line pulls the two bridle segments together. Slide the two sheet bend knots of the catch line towards the pigtail about 2" until the two bridle lines are just about straight. This seems to give a little better float and drive when the kite is flying above 45 degrees. If the knots are tight, pull the bridle line nice and tight to loosen the knot a little and then it should slide. If you don't like the change, slide the knots back. A subtle tweak that may help a little...
Don't expect any kite to fly in no wind. Move your feet an learn to fly efficiently...