I just found the ATI Sirius X6, which is currently my favorite, followed by the Hydra 52.
The X6 is one unit big enough to cover my S500 with 78 leds and 435 Watts.
The X6 is also a lot cheaper than the Radions (I live in The Netherlands), It'll cost me 1575 dollar (same for 2 Hydras) and...