guys
need opinion here
which of this is good

Kingston HyperX 4GB 800MHZ DDR2 CL5 (5-5-5-15) Kit of 2
Kingston HyperX 4GB 800MHZ DDR2 Low-Latency CL4 (4-4-4-12) Kit of 2
OCZ 4GB Dual Channel DDR2 800Mhz PC2-6400 SLI-READY 5-4-4-15 kit of 2

or if u guys have any other choice of 2x2gb do state it here