Electronic call for wolf/lion

[bergie]

Being that it is winter my gaze has been cast towards predators once again. I have called in a wolf with a locate bugle, killed one while deer hunting but have yet to target them specifically. Same goes for lions, called one in with a cow call while setup midday above a likely elk bedding area and have stumbled across several but have not killed one and have not targeted them.

Electronic calls are legal in my state, I have been known to blow money on things that my wife labels as 'more stupid' so I am in the market for an electronic call.

Those who have a call or those who have successfully called in either of the critters I mention, what preferred brand/model do you use?