Buying a new board for any marker is only really worthwhile to the existing owner... it has limited resale value as most people are happy with using a stock board (particularly for PE service & support). Therefore if you plan to keep the marker then it will be cheaper than buying another marker with the same capabilities
However, how often will you actually need to adjust the settings? Most players just set up and leave it configured, many of the settings remain untouched even in the aftermarket boards.
Yet buying a board does offer is the ability to add screen... like the Virtue OLED
BUT if you are looking to add a screen, then you may as well consider selling your Etha (market price approx £200-220) add the board (virtue Etha approx £150). For that sort of money, you can buy Ego 10 / Geo 2 without issue. Add a little more and a Geo 3 / Ego 11 will be in your price range (£400 - 500)
So it really comes down to what your plans are with the Etha... keeping it and the upgraded board offers opportunities. Thinking of getting another marker, then put your cash into the next purchase!