Further, I've flown the Aspen systems with G750 & etc components. Perfectly good for VFR or IFR. The 750 is not intuitive, nor is its iPad cousin Garmin Pilot although once you are used to it, G Pilot and the way the Aspens work with it then you are fine. The synthetic vision is only available with the Garmin screens or if with Aspen, on a separate iPad mount, but if you need synthetic vision you are probably in the wrong aircraft .....
Analogue instruments based on Garmin 430 or Bendix King 165 are good too. It depends what type of mission you expect to fly. Modern systems can overwhelm some people with too much information and we have survived for decades on simpler fit machines, but glass and information is the future (IMHO).
H-R