I consider the mk3 60mm to be a "specialty" item, the second best long distance thermal spotter we can buy. Unless you need a long distance thermal spotter, then you don't need the mk3 60mm.
The mk3 35mm scope, or even the mk2 35mm scope will get the same shooting jobs done and closer in actually have a sharper image.
That said, the pulsar trails have 80% to 90% of the image of the trijicons for significantly lower cost.
Shooting with NV doesn't work much for me as we have so much vegetation around here. I live in a creek system. If you are shooting in open fields, then the NV with an illuminator works fine. Most of my shots are into and thru vegetation and NV doesn't often match up to those circumstances.
So it really depends on the distances and the terrain as to which solution would be optimal from you ... balancing the physical conditions and the cost.
Most people use handheld thermals, I do not. I either mount them on my helmet or on my rifles/carbines.
Primary night hunting/critter control setup ... click on the pic for larger image ...
IR-Patrol 19mm 1x 640(60) on left side of helmet (right side of pic)
PVS-14 on right side of helmet
PAS-29 10mm 1x 320(30) clipped on to pvs-14 to provide thermal overlay to the 14.
Mk3 60mm on the 5.56(10.3) carbine, with cqbl ir-laser on the 3 o'clock.
If I need to shoot fast, the pas29/pvs-14 with the ir-laser enables.
If I need to detect critters 100s of yards away, the patrol can do it.
If I need to PID critters 100s of yards away, the mk3 60mm can do it.
I have a pvs-30 and still trying to find ways to use it. When there is a lot of moon high in the sky, that illuminates inside the woods and then I can use it. But the thermals can still see the critters better.
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Also note, none of the trijicon reticles have support for ballistic "holding" ... they are hunting reticles. So, for like my carbine above with 62gr tsx and 50yd zero (100yd double zero) my hold is 6 inches at 200yds, 12 inches at 250yds and 20 inches at 300yds and I'm about at my limit then for holding with the critter as the reticle, normally hold that much up above the center of the center of the neck.
If you need to shoot out to 500yds, that is different. The pulsars actually have some reticles that support holding. Also, some of them can save 10 different zeros and you could use that as sort of a "dialing" capability.
Using a longer barrel with a flatter flying cartridge would also help.
In my experience shooting 300yds at night is a long way. Shooting 500yds at night is a much longer way.
if you are already shooting dogs at 500yds with your current setup, the thermals will not help your shooting, though they can help with detection and PID.
Thermal clipons can help as then you can use your day scope reticle. But thermal clipons under $10k only support about 5x magnification on average. You have to breach the $10k barrier to get into the 10x + supported magnification (day scope magnification behind the thermal clipon) space. Then 500yds is a little easier from a gear perspective.
For mostly 200yds and in, the critter as a reticle works fine for almost all rifle/ammo combos (heavy subsonic bullets being an exception).