If you can wait, then wait. Starting next month laptops using the new Intel Ivy Bridge CPUs and AMD Trinity APUs should be available for sale. They represent an increase in performance over the previous Sandy Bridge CPUs and Llano APUs.
Generally speaking, Intel's CPUs have better processing power than AMDs APUs. Therefore, they are generally better for anything that uses a lot of processing power like encoding videos. However, the graphic core in AMD's APU's are more powerful than the graphic core in Intel CPUs. Therefore, games will perform better with AMD's APUs. "APU" is simply a term AMD came up with for a combined CPU with integrated graphics. Even though Intel's CPUs also have integrated graphic cores, Intel still calls them CPUs.
In terms of graphics performance, the Intel HD 4000 graphic core is basically as powerful as a Radeon HD 5550 desktop graphic card; all Ivy Bridge Core i3/i5/i7 CPUs will have the HD 4000 graphic core. The graphic core in AMD's Trinity APUs vary based on the model, the most powerful graphic core is the Radeon HD 7660G in the A10-4600m APU. It's performance is a little faster than a desktop Radeon HD 5570 graphic card; you can say the HD 7660G might be almost as fast as a desktop HD 5590 if such a card ever existed.
The Intel HD 4000 graphic core works by itself. If the laptop you buy comes with a nVidia or AMD graphic card, the HD 4000 automatically disables itself. If a laptop with a Trinity APU also comes with an AMD Radeon discrete graphic card, then the integrated graphic core and the graphic card can both work together giving better performance than either one alone; "hybrid crossfire". However, I believe any graphic card faster than a Radeon HD 7670M will automatically disable the integrated HD 7660G. Lastly, only a few high end gaming laptops ($1,500+) may offer you the opportunity to replace a discrete graphic card.