  We aim to refine the sample of isolated early-type galaxies in the AMIGA
catalogue via high resolution imaging. Here we report the result from a pilot
study investigating two candidates, KIG 685 and KIG 895, in K-band with the
laser guide star and wavefront sensing facility ARGOS} at LBT. Observations,
obtained during commissioning time, achieved a PSF of ~0.25". We present the
data reduction and the PSF analysis from the best closed loop exposures to
investigate the galaxies' morphological structure, including their nuclear
region. We used PROFILER for the decomposition of the azimuthal 1D light
distribution and GALFIT for the 2D analysis, accounting for ARGOS's PSF. KIG
685 was found to be a S0 galaxy and has been modeled with two Sersic components
representing a pseudo-bulge (n_{1D}=2.87+-0.21, n_{2D}=2.29+-0.10) and a disk
(n_{1D}=0.95+-0.16, n_{2D}=0.78+-0.10). Nearly symmetric ring/shell-like
structures emerge after subtracting the GALFIT model from the image. KIG 895
shows a clear irregular arm-like structure, in which the northern outer arm is
reminiscent of a tail. The galaxy body is a disk, best fitted by a single
Sersic profile (n_{1D}=1.22+-0.1; n_{2D}=1.32+-0.12), i.e. KIG 895 is a
bulge-less very late-type spiral. ARGOS high resolution images clearly revealed
interaction signatures in KIG 895. We suggest that the ring/shell like
residuals in KIG 685, a "bona fide" early-type galaxy, point towards a past
accretion event.
