On a more sober note... woof,
I've tried the G02x and G01x clocks with my Eso rig, and it was definitely an improvement, without a doubt. The only issue is, I just can't justify the price tag of 20 & 30grand just for a damn clock! Hence, the reason why I proposed that wall clock.
Anyway, I believe apart from other electronic elements, such as the transport mechanism and DACs, the clock would seem to be the most significant change, at least to me that is. So without having to sell off your entire digital rig, by just adding a dedicated master clock with the right connecting cable is what I would recommend, especially for those wanting to keep their existing Eso player. In which case, there's always the trade-in option with the dealer / importer who may offer a better deal as the trade-in price on upgrading to a higher model, such as the new XD series players. Then again, if the clock does more justice and offers a better experience all round, just get the clock!
Either way, the G0x clocks were really well designed and contributed towards a beautiful sound that was very engaging with the music. It had all the emotions and a very high musicality factor. However, I still feel it's not a "must have or can't do without product" because once you've got the right player in your particular system and there's great synergy, I'd recommend to just sit back and enjoy those fine tunes!
The choice is yours!
Cheers, RJ