If it was me and I wanted a cheap dedicated unit, for the money the Yukon Photon XT6.5 is good with the right IR torch.
I hate add ons with big daft screens on the top of the scope, bulky, easily knocked, wires , not for me...
I use a Ward 700/800 on everything from air rifle upto centrefire using either MTC mamba/viper, Hawke Sidewinder or Sightron scopes and its a nice self contained unit compact, keeps your normal shooting position, allows you to mag your scope right up if needed, very easy to swap between rifles..Cost £800 but there worth it for the versatility ...