Amazon currently has this 6-outlet power strip from Belkin that has outlets that pivot and is also wall-mountable, on sale for just $14.07. That is good for around $5 off of its regular price. And it's a good pickup for an office area or an entertainment center.
This power strip from Belkin does have six outlets, which can pivot. This is great because some products have larger power adapters than others, and by pivoting these, you are able to use all of these ports without others getting in the way. Six ports is also going to be plenty for using in an entertainment center, for most people. This is also wall mountable, so instead of keeping it behind your entertainment center, you can mount it and keep things looking pretty nice. It also has a 1080 Joules rating for maximum energy protection. What this means is that if the power goes out and then comes back on quickly, your stuff that's plugged in won't be damaged - except in very rare and extreme cases. That is definitely a good thing, even though the power doesn't go out all that often, it does happen from time to time and being protected from it is definitely a good thing here. This power strip won't be priced this low for long, so you'll want to grab it before it's gone.
This item is also eligible for Amazon Prime's free shipping. Which includes free two-day shipping, and pretty cheap (usually $3.99) next-day shipping if you need it extra fast. If you are not an Amazon Prime member yet, you can sign up for a free trial of Amazon Prime. You'll get 30 days free (if you're a student, you get 6 months), and then it's $119/year (or $59/year for students). Prime members do get a whole lot more than just free shipping though, so be sure to check out the full benefits.