What about the XSPC Raystorm?

It's a pretty good deal compared to the EK Supreme HF - it's about the same price as the EK but cools ~1C better.

What sort of budget are you on, and what are you looking to cool?

For n ow just an e8500, in a few weeks a Bulldozer 8 core if the benches are decent. Maybe a gpu later.Probably a 560ti.

Make sure you take into account the total amount of heat watts being produced and needing to be cooled in your loop. Your radiator choices should be dependent upon these numbers.

Is there a budget to the loop?

Raystorm seems to be a decent block according to the couple of reviews I've seen on it...a little higher flowing that the Rasa block if I recall.

^ Yes...budget is typically the biggest handcuff for any build.

According to Martin's review, it performs about 1C better than the EK block, but is cheaper ($62.99) than the Acetal ($71.95) and Copper or Nickel ($82.95) versions of the Supreme HF, as well as the Apogee XT ($79.99) on FrozenCPU. It basically ties with the Koolance CPU-370, but is ~$20 cheaper ($87.99).

It also has an LED, which is pretty nifty and is a nice option.

Review:
http://martinsliquidlab.org/2011/09/26/i7-2600k-cpu-xsp...

As far as a budget I figure around 65 for the water block, 115 for the rad, 80 for the pump, 30 for the res, and 40 or 50 for tubing and misc.

480mm of rad space is probably enough for the 560Ti and the CPU, depending on any OCs; if you want an internal set up you may want to consider 2x240mm rads.