any corsair ram that you get, will be very reliable, and you can overclock them a bit. The pro version (the one with the lights), is a little faster, and corsair claims that you can overclock them more, but some reviews and benchmarks have shown otherwise.
If you really wanna get a gig at the cheapest go with the c2. After careful consideration I think i'm gonna get the ocz 4000 gold, but might get the 3700eb, thats just as good. Anandtech.com has that nice ram comparsion article, i think theres a link to that in this post already, but here it is anyway http://www.anandtech.com/memory/showdoc.html?i=2082&p=12.
From the charts you can see that corsair's pro version is better than its other versions, but still lags behind ocz.
The ocz 3700eb had about an above average performance. The geil plat 4000 did amazingly well but the voltages of 2.85 and higher are needed just for it to run it stable at stock speeds. The ocz 4000 gold wasn't in the testing, but the gold version is the same thing as the EL version (i think, correct me if i'm wrong, but the full title of the ram should be ocz enhanced latency dual channel gold
), and the price is about 310 on newegg.com, which is pretty much the same thing as the ocz 4200 EL, which on the anandtech article seemed that it was one of the top 3 ram chips. If you want better ram, you gotta spend at least 350, which that would be the ocz 4200el.
one more thing, i was reading user reviews for the oc 4000 gold on newegg.com, "I have mine at CL 2,2,2,5 @ 2.85v in p4c800-e deluxe". Thats insane! Knowing this gives me a nice fuzzy feeling inside : D.
One more note, becareful about value select ram from corsair or any other company, they are just pc 2100 or pc-2700 ram overclocked. <P ID="edit"><FONT SIZE=-1><EM>Edited by allnight on 06/18/04 12:13 PM.</EM></FONT></P>