Didn't know about Magix. What a great thread!! I understand about "simple" but I bet you'll be flying soon with your editing. Nice to try to stick to one that's going to meet your needs as you get better.
Serif does very good software too. Often their upgrades aren't that significant so you can find older versions of their software pretty cheaply and not lose much functionality over their latest stuff. Try Amazon / EBay but only buy if it's legit and not yet registered. Their latest video package is MoviePlus x5 and it can handle HD, blu-ray/DVD burning, image stabilization, noise reduction, and if you want it, masking and compositing etc etc. They have always hugely impressed me with the usability of their stuff and it's very easy to use at a basic level too.