Smile [Q] Best KitKat Rom for Xperia U

Ok hello everyone.

Firstly, If I have posted this in the wrong place, I apologise....I didn't come here to piss off anyone. There are so many posts I got confused.

So I've been using [SXU]Infinity Rom v3 by acervenky. Its the best ICS Rom in my personal opinion, the most stable I found so far (I use it with Greenify). Oh and I have unlocked bootloader.

Now I dont test roms or develop stuff and when it comes to tech stuff consider me a newbie....just regular guy wanting to use KitKat on his Xperia U for daily use, which eats less ram, is stable enough, and I really love themes and stuff but performance is priority.

So which of these would you guys recommend that I can flash for daily use:

1. XNovathor Project 4.4.2 V2 (because who doesn't like a lot of ram...)
2. CarbonRom KK RC1 [ARM-EABI] (because it looks supercool like batman)
3. Unofficial SlimKat (kumquat) [RC2] [BUILD 3 - 1MAR] (because as they say its really slim? and looks good too)
4. AOSB Project v1 (because it has tons of features)

As you can see I like all of these, but I'm not sure cause I don't really have that expertise to judge it well.
So what do you guys say?

Which one should I use?