Just do what I did: buy both sticks!
Actually, I can sell them used in Japan for at least what I paid in the U.S., so I'm not crazy. The XMS 3500 was priced at $230 last week and I thought that was insane; it is now up to $250 on Newegg.
One thing good with Corsair is even if they don't do what they are rated at, they will willingly RMA it.
"I wish they would certify um at 2-2-2-6-t1 rather than 2-3-3-6-t1
the other timings are just as important"
You are pretty much asking for too much for 2-2-2-6-1. Maybe some day. Won't make much diff in bandwidth over slower settings but maybe it will show up in 3DMark.