I personally like to use Arctic Silver 5 High-Density Polysynthetic Silver Thermal Compound AS5-3.5G over oem ones, why ? 2 reasons, 1 it dries up in warm temp areas and I live in Texas and I find the oem paste on cpu/heatsink and dry and brittle. secondly, AS5 has been proven to be better than almost all standard pastes for thermal diffusion to heatsink, bringing temps lower under heavy usage.
just saying. and its so cheap.... $4.79 for peace of mind... why chance the oem is your best solution
Note: when I state over oem, I mean I remove oem paste and replace it with, not add it over the oem paste.