Getting killed by a lame robot? General Grievous, Battle Droids etc - no way, Windu will only fall for either the Emp or Vader.
Red Superfly I completely agree with you on one thing. Mace Windu deserves a glorious death. However even though the best death for him would be in the hands of Anakin which I'm fairly sure it will Grievous is not some lame battle droid. In fact he can hold his own against Yoda, who would struggle to beat him. This may seem silly but it's the purest simplest truth.