I recently pulled an engine from an '01 with about 110k miles. It had the original IMS bearing, a dual row, and it looked great. There was no play and the bearing turned smoothly:
The IMS bearing was good, but the rest of the engine didn't seem to care. It could have had an IMS Solution; The exhaust valve and much of the #2 piston would still be in the sump:
I still think that the IMS Solution is the best way to go if you want your Boxster to be your 'forever car'.
*I purchased this car with a known bad engine and don't know the context of its failure other than highway driving when the engine stopped.