I've not seen any of these "in the flesh", but have been seriously considering either the 420 or 620.
I've owned a couple of late 70's 2619's in the past (same specs), which were real LP Killers, fantastic guitars, and with the addition of the Tri-Sound switches, they add some really useful, and easily accessible sounds. The 2619's pre-dated the "AR" range (even though they were "Artist"), and the specs are slightly different, the "AR"s tend to have thicker bodies, more like those of the LP / Yamaha SG, where the 26** series had thinner bodies.
Some of the previous reissues of their 70's/80's range guitars have been superb, so I wouldn't expect anything less from these.