This would be a good option for that budget. If you could expand the budget by about twenty bucks, you could move up to a much better power supply and I would recommend highly that you consider doing that, although this one isn't all that terrible, it also isn't all that great. The CXm units are "just good enough".
Here's all the RGB you can handle while staying below $1000 even before rebates.
Before rebates and after shipping costs on a couple of items it's base total is $971.48
Also note that the motherboard is more affordable if getting it from B&H, but there's a slight back order on them so it would take 7-10 business days before it ships. Otherwise can get it from Newegg for the same price but you'll pay taxes and $4 shipping on it.
But you can look into the retailers by following the link to the build on the website.
Really? Because I don't see any RGB at ALL, except on the fans. That case does not have any lighting. Those memory modules don't. The only RGB in that build is the fans. ??
And it has a significantly weaker graphics card. Doesn't seem like an improvement at all over what I posted, but it's certainly an option. It's also not a Corsair case which the OP specifically asked for.
wasn't aware that the case specifically had to be Corsair, didn't see that.
all I see is the title which says "Good Corsair Build" which could mean anything Corsair not specifically that every possible component had to be Corsair.
But ok fine, let's do it this way then with ALL things Corsair and RGB shall we?
Had to opt for a non RGB cooler to keep it under $1000.
But, RGB fans can be bought later on to replace the ones on the cooler no problem.
Otherwise having a Corsair RGB cooler that fits in the top of the case will cost $160
Keep in mind that the Spec Delta uses 12V, 4-pin RGB fans - these are unlike every other Corsair fan. They do have RGB and it's controlled by your motherboard but they aren't the RGB fans that you typically see in the Corsair demos.