Re: Which young gun will win the most slams?
Looking at the list Murray and Djokovic may win a lot of GS titles in next 5 years.
Over next 5 years possibly only see 1/2 GS titles won by that list and not sure who; best guess Dimitrov and Tomic.
The current greatness league of active players in order of achievements to date (a factual comparison rather than fan biased assessment):
Federer 17 GS, 6 Year End Masters, 24 Master Series.
Nadal 14 GS, 27 Master Series, 1 Olympic Gold.
Djokovic 9 GS, 4 Year End Masters, 24 Master Series.