My thinking is that you might lose a bit on the performance because it wouldn't be purely striped, but if a drive goes down you can rebuild it from the missing parity bit.
Perhaps that doesn't make sense, and stripe-and-mirror would be better.
Thanks for the comments regarding buying more RAM - however, please note that that is not what this question is about. For the sake of this question, you can presume that the system has already been maxed. I am fully aware of the preference for "real" memory vs "virtual" memory.
Several environments expect or require swap to be configured (one of note is the system I work most heavily with that requires a swap segment at least equal to the physical on the machine for the environment to be supported by the vendor). It is, therefore, prudent to consider the *best way to implement swap for such an environment.