@ nguyen, I wouldn't write off the kit just yet. Yes there are some faults with the motors but treated as per the advice in this thread they come up fine. Not great, not perfect, but fine. I do believe if I picked the right ESCs in the first place the quad would be flying now and there are vids on you tube showing them fly. So if the budget is primary I reckon this kit could be the go. When the new ESCs arrive I'll get this flying so you can make your judgment then.
I notice, though, that you are shooting for a slightly larger quad. This means better stability and ease of flying. However I'd go for proven ESCs, for example I have Plush 18A coming for my tricopter project as they are proven in other Tris. Bigger size brings bigger price so you may need to consider that. I have to admit that the goal of this project is to make the cheapest yet half decent quad that I could.
There is an interesting page on the multi wii copter shop. These guys sell frames but they are good enough to post a page of things that they have found that work through trial and error:
http://www.multiwiicopter.com/gear-list/ Note the flyfun ESCs are very similar to the equivalent plush escs.
Note also your shopping list will need the Atmega programmer.