I understand your impatience man, but you have to remember the members here are worldwide so a response may take some time
firstly, 500-700 what? Dollars, pounds rupees, euros?
What are you wanting to cool? the Cpu and Gpu, just the Cpu?
You already said your case so we know the room you have, what Motherboard and chip? just intel doesn't help much, the socket type is what we need to know for the Cpu block
and as a basic answer, no one company makes the best, one manufacturer is great at pumps, one may be a gpu block heaven, but everything else they make is tat,
you need to break a list down and then start researching each component
Cpu block, I'd suggest XSPC's Raystorm right now,
any variant on a Laing D5 pump is going to be a winner (many people rebrand those and sell as their own)
you'll need a radiator or two too, to get rid of the heat created,
fans for the above, maybe a fancontroller unit as well if you want to control them (You do)
tubing, use is obvious
maybe a reservoir, not all loops have one although a majority do
fittings to connect it all together,
check the stickies in Rubix_1011's signature, those are a great place to start reading up, be patient and answers (and help) will come, but in watercooling, rushing and impatience will only lead to frustration, tears and possibly explosions
Moto