I've tried a handfull of different settings and still get SODs when ending a call. Can't live with that for the minimal amount of performance increase. According to the benchmarks in SKTools, not much difference.
Benchmarks
|@528 |@710
Integer |327.6040 |379.9755
Floating point |7.578 |10.230
RAM |611 |629
D-bit |841 |1010
Main write |2349.52 |2289.12
Main read |5264.78 |5202.37
SD write |405.17 |530.75
SD read |8347.83 |7375.75
File Access |1949 |1768
File SD |1807 |1838
SK load |3228 |3228
The faster main memory read/write speeds and RAM access speeds are negligible and not worth the headache of having an SOD after a phone call. I did notice that the SODs seem to only happen on incoming calls and not outgoing ones. Something about the way the processor ramps back down may be causing this.