1) Apparently my mobo will only do RAID on the 3gbps SATA ports and not the 6gbps ones (why? stupid!). So I will lose some of the SATA III awesomeness of these drives when RAIDed.
this must be new that's something I'm not aware of

2) I have read conflicting reports about how good RAID 0 is on SSD. Some say the improvement is as little as %15.
it's definitely not double the performance.
3) Lack of TRIM support. This factor is not huge since the Corsair drives are supposed to be able to do this on their own (or something analogous). Also I will be imaging the whole drive to a large RAID 5 array on my network, so if I lose performance I will just secure erase, reformat and re-image. However, still a concern.
IMO, with the current price, it's not worth to doing RAID
4) I read some people ripping on onboard RAID saying its not worth it unless you are using a dedicated RAID controller.
It's not true, they are getting better now. It's not like few years ago, of course a dedicated RAID card will be better but are you willing to disc out a couple hundred dollars more to get this controller card.
So based on these factors (and any other yall are aware of) should I still go with RAID 0, or just put the two drives on the 6gbps ports and use one for OS and one for games and relish the still-awesome performance of these drives?