Wullie:
Love your UI Wullie. You use a lot of things in your UI which I have in mine like the same button art with Masque and using Prototype font for most if not all of your UI which is my favourite font. Also I like the size of the unit frames; very small and simple which is the way to go.
WoW6000:
There are many UI's available for you to pick which one you like best, download and try out on WoW Interface: http://www.wowinterface.com/downloads/index.php?cid=28
I would recommend the one I've made but thats incredibly bias of me. I know that TukUI/ElvUI has everything you are looking for and have heard many good things too. LUI is another very popular choice too.