There are four motherboard models, the first two are known to have SERIOUS RROD issues. The latest two, falcon and Jasper, don't have it as often.
The Falcon unit has a smaller CPU core, from 90nm to 65nm if I remember correctly.
The Jasper has a reduction in both the CPU core and GPU core, the only unit to have both cores reduced in size, and power consumption
IMO Try to get a Jasper unit, or try to do the XClamp mod as that has been known for quite a few years now...
BTW, so far there have been no jasper units with the RROD failure reported.