best after-mkt cooler for 8800gt

here is my card:
http://www.newegg.com/Product/Prod [...] 6814130318

i have room for a dual-slot cooler and was looking at these 2:

ZALMAN VF1000 2 Ball VGA Cooler - Retail
http://www.newegg.com/Product/Prod [...] 6835118037

ARCTIC COOLING ACCELS1 Rev 2 VGA Cooler - Retail
http://www.newegg.com/Product/Prod [...] 6835186016

which one will provide better cooling? will either stick out beyond the end of the card? i have a 120mm intake fan right at the end and the pcie plug barely fits. i can control the current fan on my evga via ntune or rivatuner. in order to keep temps in check, i have to turn fan way up which makes it real noisy. the last after market vga cooler i bought was for my 6800gt agp card from artic cooling. it is still in use today and kicks butt. neither one of the ones above will blow the hot air out the back of the case like my 6800gt does though.

also, i have only one free slot so anything bigger will not work. thanks for your help.

I can't comment on those two, but I'm thrilled with the results I got with the Zalman VF-900 CU on my pair of 8800GT (s). Temps and noise were greatly reduced over the original reference 8800GT coolers.