MizT, I've owned and ran PC, T5 fixture and T5 retro. Hands down the best way to go it T5 retro. More versatility for your needs. By the way just wanted to mention I'm typing all this on my iPhone right now! Anyway, I am an extremely handy guy and have been a bike mechanic for close to ten years. With that said I was very nervous taking on the task.
But I will tell you it was the easiest Diy I've done for my tank, and maybe the most fun a d rewarding.
And Jojo is right that's what we are here for, to help each other.
I say don't be worried a bit, order up a 4 bulb Ice retro kit from DiyReef and dive in head first we will all help you throu it. If u stl feel hesitant have Deb ship it to my house PM me what you want it to look like and I will build it for you! Just pay for the materials and shipping, I'll take care of the rest!