Upload & Sell: Off
Since the 600EX-RT will only be able to be used with the Canon radio system, your Wizards are a little misplaced there and the remote functions will be rather limited.
I use Quantums. All of the Trio's, T5d-R's and X5d-R's at 80Ws, 160Ws, 200Ws and 400Ws. They work in TTL or even remote manual control, right throughout the range and their radio system is something special.
It used to be important to link these in with my Speedlights/Speedlites with their optical systems - which they will by using Qnexus, but Quantum have added a radio remote system to add Speedlights to THEIR system, so the Qnexus system is not so important any more. You can STILL use iTTL/eTTL optical to control remote Quantums (if you want).
Speedlights are not so important anymore. I barely use them. I have monolight systems and studio pack systems, but they barely leave the studio. For location work its always the Quantums which get taken, (I have additional Lumedynes as well if I need beyond 7-8 units), and having the scaleability of output from hotshoe (Speedlight) output to studio strobe output is something unmatched by any other system and you're never messing around with modifier fittings, swivels or mounts as they're all the same.
I wouldn't suggest mixing Quantums in with your 'Wizards'. Maybe at first, but ultimately to benefit from the system fully you should just change to the FreeXwire system if you decide on Quantum. It triggers TTL or Manual remotely, will trigger Speedlights/Speedlites in TTL as well as Studio strobes in Manual timed with the TTL. Add in Relaying, Sequencing, Groups, camera triggering, useable high sync speed to 1/8000s etc. etc. and it makes a great SYSTEM.
I just needed a couple of replacement parts.. Quantum sent them for free. Upgraded a radio, $30. Few manufacturers even provide an upgrade service. I don't ever intend selling mine, they work and I don't ever expect them to die, so resale value is of no consequence. They don't get cosseted, by the time they come to being sold they would have earned their keep in being used. Thats what they're there for.