It depends on your taste.
And whether you enjoy pain
If you are
not into masochism, keep reading.................both systems mentioned below are good news for people who don't like pain.
Zorin, OS 9 or 11 are both great. But, I prefer Mint 17.3 Cinnamon Rosa.
Believe me, I have tried a good many Linux "flavours", I settled on Rosa LTS (Long Term Support) 2019 because it feels like home, but in another country and the weather is good
What you will probably want to do is visit either of the above, official websites and download the ISO's and only run them as "live discs" for a few days
before you make your choice. I only say this as, there are
some compatibility issues.
Mostly they run out of the box, but there IS, as always, bugs, that you
may run into that can cause frustration i.e. USB/DVD/Connectivity.
(Mostly with newer machines or custom builds).
Ubuntu 14.04 is a good system (both of the above are forked from that OS.
BUT..........
Personally I cannot get away with it. To me it feels
alien and its interface (although, none
too difficult) has a slightly steeper learning curve and not very intuitive. For Tux-Heads and die-hards, this is great. For boat jumpers; not so friendly.
Zorin has a fair amount of eye candy to start off with; Mint is slightly more difficult to configure, but, I think it is more "fine tunable" and feels more solid.
Both are "Works in progress" and
some times disappoint, especially if you are a Windows freak. Both can look remarkably like Windows 7 and even act like them,

about the only thing I miss about Windows is the lack of cascading window tiles, even then there are alternative views than that.
My choice would be
https://linuxmint.com/download.php
(Rosa,Mate or Cinnamon, Mate is even more configurable, but..................read up on it and try them if you wish).
I have never been a fan of Dual Booting, my argument is that occasionally hardware issues arise with that route; it is only upon
complete removal of the Windows OS that, you can reap the rewards of either Zorin or Mint.

My screenshots of 17.3 Mint, Cinnamon Rosa 64bit is as solid as a railway sleeper. That is;
fully installed, without
any Microsoft bullsh*t what-so-ever.

Tweaked, colours and transparency, slightly, from the original themes (hey, I am learning). No whistles, no bells. Not singing or dancing....................
It just works...............
incredibly well.

Oh yeah, Windows 7 installed in VirtualBox works pretty well too for those programmes that are difficult to replace in Linux.
Hope this helps
(Get Linux in whatever form you please. It may mess with your head to start with, but it won't rape your wallet or your privacy).
http://www.chattchitto.com/forum/viewto ... 62#p346462