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Being able to accurately view signals to debug a particular problem is a need ability for any oscilloscope. Compare the RIGOL 7000 capabilities versus Tektronix MDO3000.
Debugging Offset Signals Comparison of the MSO7000 VS MDO3000 - by Rigol
Rise Time Comparison of the MSO7000 VS MDO3000 - by Rigol
Sampling Comparison of the MSO7000 VS MDO3000 - by Rigol
Waveform Capture Rate Comparison of the MSO70000 VS MDO3000 - Rigol
Jitter Comparison of the MSO7000 VS MDO3000 - by Rigol
RIGOL's VNA Calibration Guide