To add to the constructive critisim posted above, I think you need to make better use of visual alignment and contrast. What I mean is you must either make elements that are close together perfectly line up, or make them markedly seperate. What is adding to the clutter people are commenting on is the fact that there are a lot of elements that are maybe a few mm off from perfect alignment - it's throwing off our eyes when we scan the page.
For example, in the lower quarter of the page, you have two headlines in black, and that blue bar. The baseline of the "Rumer Shrumer" headline should rest at exactly the same vertical position as the bottom of the blue bar. And the "Safari Updated" headline's left edge should be in perfect alignment with the left edge of the blue bar. Right now, these elements are mildly off-alignment, which looks sloppy. If you don't intend for elements to align, then make the differences more pronounced.
The comments posted here about the main point of interest, et cetera, is related to contrast. If you blur your eyes (by squinting) and stare at the page, nothing immediately jumps out at you. It's all a wash of grey. One suggestion would be to focus on one product shot, say, Final Cut Pro and make it very big. Then make the other two products smaller, and put them below FCP.
In all, I think it's a good start that shows promise. Other suggestions: keep in mind who your audience is, and what they want in a magazine. Also be mindful of the purpose of any magazine cover, which is to make your magazine stand out from the others on a crowded newsstand. If you are serious about pursuing this as a source of revenue, I suggest as an excercise going to a local newsstand and taking a picture of the rack. Then, in Photoshop, insert your cover design in various spots among the other magazines. Can you see it? Does it stand out? Grab your attention as a potential reader? The bottom line for any successful graphic designer: does what you produce meet the needs of your audience, and your client?
Best of luck, and keep these designs coming!