I've had a fully integrated Garmin system (liked it a lot) and now have a fully integrated Raymarine System that's 2 years old. While the two systems are a decade apart, I think I preferred the Garmin better, though the more modern features of the Raymarine are welcome.
My preference is to have the capability to have all the systems showing on my chartplotter when necessary/desired. Being able to overlay AIS and radar on a chart is immensely helpful for safety of navigation. On my Garmin I could also overlay weather from the satellite weather XM receiver (didn't find that particularly useful though). It is a lot of information, but if you spend the requisite time becoming familiar with what you're seeing before it gets dark, or foggy, (and you need to) you'll be very comfortable when under those conditions. It will also help you tune your radar better, since you'll be able to know whether the radar is displaying those markers (for example), or not, and tune it to display what you want to see. Is radar displaying offset from land on your chart underneath it, and if so my how much, and what direction? Etc.
I strongly recommend color doppler radar as well. It will help you prioritize targets very quickly, understand more quickly at a glance what you need to be concerned with, and what's not an issue at that moment.