New PC for me!

Looks like a nice system. I don't see any problems. The one thing you might want to change is the RAM speed. Get 1600 RAM instead.

What are you getting for a monitor, keyboard and mouse?
 
Applications built to run on 64-bit system tend to run a little faster than their 32-bit versions.

Also, you will be alse to have more applications open at once on a 64-bit system with all that memory.
 
You really will not notice any difference between the memory speed.

You should get the 64bit only because most applications, games, everything in general, tend to work better on a 64 bit system. Also, if there is a program or something that works very well with 32 bit, chances are that it will work better on a 64 bit system. :)
 
It's very hard to quantify the difference between ddr3-1333 and ddr3-1600 other than to say that memory operations will be faster with the 1600 memory. Will you be able to feel it? Probably not in most cases, but if your system is built to operate at that speed, I think you should take advantage of it.
 
If you want to save some money and put it somewhere else just get 1333. Really you cannot see the difference. It is seriously a small difference. But then again, memory is really cheap nowadays.
 
Yes you have to buy a dvd burner! Haha if you forgot that part, it would be bad 😀
It should fit without a problem.
Anyway, they are all basically the same, unless you want blu ray as well. So, just pick whichever one you like, which brand you like, or which one is on sale.