On the other hand if you are fortunate enough that money is not an issue and you love being able to WOW! your friends and strangers with envy running artificial benchmarks go for it.
I appreciate the feedback, FascistNation. And you hit on some great points.
Is money an issue? Yes and no. I don't want to be frivolous, but this is my one "treat" that I get to enjoy every few years. That being said, I am truly surprised at the price of SSDs - they haven't changed at all in the last 12 months; if anything, the prices have ticked up. I really expected SSDs to be cheaper than where they are now.
Do I love being able to WOW friends and family? Sure, who doesn't? I wouldn't go out of my way to brag (especially to friends and family - they would have no clue what I'm talking about), but if I were to describe my rig to another geek, I'm sure I'd "drop" that mine had SSDs running in RAID.
Impressing them (and me) with high artificial benchmarks? Now THAT'S the key. Artificial benchmarks have their place, but in designing a rig I don't want a computer that can "theoretically" hit high numbers in an artificial benchmark. I want a computer where I will see the benefit in everyday usage.
Do I expect 100% improvement? No. At the same time, I don't want to do it to see an incremental 10% increase either.
Since I've done RAIDs before, I'm not as concerned about doing this. I am still wavering on how I want my build to look: go with 1 large SSD to handle OS and games...or...get 2 separate SSDs: one for OS, one for games.