Buy another Zulus - the HIK Cheetah isn't in the same league
The Cheetah has lower base magnification so suffers more from pixellation as the magnification is increased
The LED based IR is very poor compared to the laser IR on the Zulus
The Cheetah does produce a usable colour image deeper into dusk than the Zulus, but the Zulus in NV mode without IR is pretty damn good
The 25Hz frame rate on the Cheetah compared to the 50Hz on the Zulus can make the Cheetah image appear very laggy when the scope is panned around
There's a reason why the Cheetahs are frequently heavily discounted - it's because they don't sell well
Cheers
Bruce