Inertial measurement unit (IMU) sensor choice

Hi every one,
I have a project where I need a high resolution(0.25 degree) and high accuracy(+/-0.25degree) device to measure the 3d rotation angles, pitch, roll, Yaw.
it should be highly reliable since the measurement needs to be very accurate.
also, the weight should be around or less 50 grams.
Please help me find one.

Note: Price is not a matter.

Thanks,
Mousa,