You guys have absolutely no clue, do you? Anand do get to keep the parts they review (most of the time) and if they can't keep anything, they simply go out and buy it. If I am not mistaken AMD and Intel both send out a few high-end CPUs to all their labs. Plus AnandTech generates around $1.2 million in advertisements, so they do have the power to buy things on their own.
Anand could care less about SLI. He makes so much money and he gets so much stuff that he probably doesn't even care what system he has as long as he is getting his work done.
Let's not forget that AnandTech has been around 8 years, which means hands on testing on a lot of high-end parts. Anand probably doesnt' even get excited much about the hardware like the rest of us. Companies are calling him everyday, so now it's his job.