Also, especially for older eyes, SNR is way more important than Resolution, and FOM is the snr number multiplied by Resoluton...and up, start getting into 2400+ FOM with solid well rounded specs you can add another grand to that.
Absolutely, learn what the numbers mean and how they are applied...most folk will just look for a FOM monster but I'd give up a some FOM for better (lower) EBI and HALO numbers.