|Definitely choose a roomy case with a top mounted PSU. The series of graphics cards you are choosing are big. don't get a tight case.|
Now, to evaluate your choices. IMO if a system will perform all the tasks you need it to then buying more power than that is a wast of cash just for bragging rights.
You don't even know what you want to do with this computer. What games to play, for instance. There is a huge difference in requirements from game to game. Why spend $300 for a card if a $100 card will get the job done. Or why even buy an add in card at all if you don't know if you need it or not.
This isn't like buying a minivan where you can't change the outcome if you order the 4 cyl. instead of the 6 cyl. I suggested an excellent all round board with the best integrated graphics available at this time. You have chosen to go with a board that is a little cheaper but doesn't have integrated graphics. You have chosen to go with the more expensive i5 CPU.
Nothing wrong with any of those choices if you knew what you really needed. This is your first build. By the time you get up to speed the hardware will be at least another generation behind. If you want to build the fastest rig you could to "future proof" then use an i7 board/processor. Otherwise build what you think you may need and plan for upgrade possibilities.
Hope I am making my point here. Others may disagree with it, fine. In computer hardware, as in everything, there is a sweet spot which will yield the most performance/ features for the buck. That is what I shoot for.
Case in point. You selected a $60 case. What was the basis of your choice? Obviously not price. Also, not performance because most users will tell you not to use a bottom mounted PSU case. I listed a case that IMO looks decent, gets the job done, and is cost effective. That case is not the only case to fit that criteria.
If you make choices based on the same logic then you can shave $200 or more off the budget. I hope I don't come off as too harsh here. I see you doing the same thing I did 15 years ago with a custom build. The same as most users will do if money allows. Buying hardware that doesn't fit into that sweet spot.
I have lectured you enough. You are a grown man with the cash to spend so you have every right to spend it as you see fit. I just don't agree with some of your choices.
Do you have any exposure to PC games? Knowing what games you plan to play would help you decide what graphics card to get. IMO if a card will play a game at desired resolutions and settings then getting additional frame rates is just bragging rights.
I would rather put the money elsewhere. Say into a larger/ better LCD display.
Did you check out the links in #30?