Here's my humble opinion on those forks... my son has a (used) GT Avalanche with the XCM-HLO... the first fork was in bad shape, so I replaced it with another.

The hydraulic lockout version of the XCM is entry-level, for sure, but it's not all that horrible. The cartridge that does the hydraulic lockout also provides nonadjustable rebound damping. This fork is very heavy and reasonably stiff. It uses plastic "slider" bushings and no oil bath. These bushings are cheap and easy to replace, but I don't expect them to have great longevity.

The XCR is a similar fork, but the stanchions are a little nicer finish and the lowers are magnesium instead of aluminum, shaving off a little weight. This Kona has adjustable rebound damping, a nice feature. The tapered headtube gives you a better path for future upgrades.

I think the TK is more like a traditional Rock Shox fork, with metal bushings and oil bath lubrication and a damper than can (and should) be serviced by the user. I think it's a more desirable setup than either Suntour option. It's still a low-end model, heavy and with an unsophisticated damper.

The only thing I've ridden on is the XCM-LO and only just a little bit. But I don't think it's all that bad. I think either of the three bikes would be just fine for the singletrack around here... a hybrid would NOT be just as good for singletrack.