I'm going to jump in and side with dittohead here on the Fleck7000 valve. Though the 2510 and the 5600 are good valves I like the features of the 7000 better but.......in the long run it's not going to make a whole lot of difference either way. As for the Kinetico unit; although expensive and difficult to get hold of parts and the manual for they are none the less very good valves and are of exceptional quality and durability of function. If they were crap and priced as they are, they would have gone belly up a long time ago.
BTW Watersolutions and Andy are definitely not the same entity. That's just more tin foil helmet talk.