I'm in the minority here!
And again as everyone else has said, it's all about personal opinion. I have tried (via renting) other clubs to my own (The L83 G20s), including both the RBZ sets and The R-11 clubs I'm able to! I've also tried the R-9s and some of the other TM stuff.
In my opinion (and I think this is possibly due - on reading of replies to this thread - to the slower meter speed) The G20s are the best of the bunch. I think they simply suit me better!
This is the crux of the discussion - go with whatever suits you best! Until I reach Legend (I'm a TM now at L89) and reach the levels where I can try the new R1 driver and the R-11 Irons, I'll be keeping my G20s.
Out of interest as well, I've tried wedges, woods and putters over the rental periods and think that having tried loads, when I can I'll have the ATV (as opposed to the Cleves - the Pings are in my bag at the moment) Wedges, The Ghost Manta Putter (Ghost Spider in there at the moment), the R-11 Irons (G20s at the moment), G20 3w/hyb and the R-1 Driver (this is based on my stepson using the earlier version on here at the moment - what a club that is!) although the R-11 OS Driver will have an airing too when I can use that one I think.
I use the Callaway iS Vapour balls generally now, and the results with my current set up are pretty good!
At the end of the day it's whatever suits you as an individual.