So, I finally picked a custom UI. I went with Thor which is a complete package including an installer and I am quite happy with it.
Features include an enhanced crafting window and a really nice XP window that shows all 3 XP levels at once, (adv, TS and guild), including a decimal readout so you know exactly what percentage of the level you are at. (56.8% for example) Player status is also more detailed with a numerical readout of your current and max health & power visable at all times.
Lots of other nice perks like mini hotbars and smaller bags that are 6 slots across instead of 4. You also get an improved bank window and many other goodies like an advanced start button area with mouse click options like map, knowledge book, showhood, etc.
Install was clean and painless and the package includes UISwitcher which is an application to let you change UI's on the fly.
You can look at it or download it HERE