You must be rich.
Personally, I really have an issue with how Nvidia cheaps out on RAM the last few generations. There are a lot of people with GTX 580's out there right now that are still fast enough, but being choked by 1.5 GB RAM.
Which is to say you're paying $700 for than 780 Ti, and only getting 3GB RAM. For a card that expensive, I really dont like it, it could limit you in the future.
I'd at least get a 6GB version if they sell one and you must stay with Nvidia (I realize most Nvidia users wont accept any other product, no matter how inferior in quality and performance and overpriced the Nvidia option may be).
So yeah that's my issue with the built, get a video card with at least 4GB RAM for better future proofing, if you are spending such a massive amount of money.
I'll give you a personal example, back in 2009 I was looking at a HD4890, either 512MB or 1GB. People on forums told me 1GB was overkill, not worth it, etc. I went with the 1GB for future proofing. Well that 1GB 4890 served me well until 2013 when my brother gave my a HD6970. If it only had 512MB, it would have suffered much sooner.
Personally I'd probably go with a aftermarket R9 290X, it will be almost as fast, quite and cool, and comes standard with 4GB of RAM, all for $300 less than the 780 Ti. But then again I dont know if aftermarket 290x's are out yet, I think they're close anyway. Also AMD video card prices are currently high because of litecoin mining, so it might be $500 right this second.
PC parts, I'll say it ten billion times, are all about the sweet spot, unless you're just rich, buying a $700 gfx card or CPU is just a bad idea. Think how all those people who bought $1,000 Titans just a few months ago feel, now they are beaten by a $400 290X. You want to buy in that $200-$400 sweet spot. You dont want to go lower OR higher.
