Hi all, this is my first post here

I decided to buy a new keyboard (i am currently using a Logitech G110) but i'm having a hard time deciding which one.
The main features i'm looking for are:
-ISO Layout (Italian pref but everything is fine)
-Brown Switches
-Backlighting
-TKL
-PS/2 pref, is the difference between USB and PS/2 noticeable if i'm using only a USB mouse with the keyboard (lag wise)?
I would like to spend less than €150 including shipping costs to Italy.
I haven't found any keyboard with all these features yet, therefore i've 2 options in mind
-Ducky, any model with backlighting is fine, but it doesn't support PS/2 and i'm not sure if it is available with ISO layout
-CM Storm QFR, but it hasn't backlighting
Help me pls!