The 230 degrees is really not that bad, as that's just a few degrees higher than when the fan is set to come on anyway (226 degrees). For a lot of us, it was a past mindset that we had to overcome in the initial stages of owning our SSRs. Many of us were not accustomed to such high operating temperatures in vehicles.
Before any of you do anything about the stock fan, you might want to first check to see if the fan fuse is still good and is not blown. It is fuse #37 in the diagram (60 amp), and is located in the uppermost left hand corner, nearest the alternator.
I now have both Mike in AZ's auxiliary fan and his main cooling fan replacement in my SSR. I'm happy with my setup. My stock main cooling fan was working fine, but I decided to seize the opportunity at the Springfield Super Rally to get his replacement main cooling fan at that time, and save on shipping and installation.
A fanatic friend of mine in town, "Jax", has the dual Spal fan in his SSR, and he is very pleased with its performance. In the event that your stock fan fails, if under warranty you obviously can get a sock replacement fan, or go with either of the two aftermarket fan options. I'm sure you would be pleased with either of the aftermarket ones.
BTW, here is a link to just one of the threads on this forum pertaining to the operation of the SSR stock fans and overheating issues:
http://www.ssrfanatic.com/forum/showthread.php?t=4649&highlight=fan+operating+speeds