what do you plan to do with the boat? will you use it at night? are you using radar for navigation, weather, or birds? how important is music to you? in todays market, its very possible to put $40k+ in electronics on a boat that size.
flir and ultra low light cameras are what you want for night navigation. each have their pros and cons. you will have to decide which is best for you. hell, if you have an unlimited budget, get both. if going FLIR and Black Oak, about $6k in camers alone.
regarding mfd brand, Garmin is typically considered the most user friendly. they also own fusion and you can get your audio ran through the MFD (not sure if you can mix brands and do that). ive heard that simrad is the best radar. raymarine has some very good sonar displays (realvision 3d), not sure if the others have matched it yet (havent researched this in a couple years). $10k for a 9219, and a nother $3k for radar
go to a boat show, play with the different units from different brands. if you do this, im sure one will quickly become your favorite
icom and standard horizon are considered the industry leaders for VHF, pick one with DSC and an emergency sos feature. register and input an mmsi. these will be cheap, should be under $500 with antenna and install.
if you want auto pilot, the garmin smart pump v2 will run about $4k
if you want all your components integrated with each other, get a NEMA 2000 backbone
this is getting slightly out of "normal electronics", but if you want the best ride, get a Seakeeper Ride system. it is essentially smart/active trimtab system that make a huge difference in ride quality. pricey, but owner account i have come across has been incredibly impressive. some have described it as significantly closing the gap between a mono and a v-hull. you would need to glass in your current trim tab pockets. prepare to spend maybe $15k on this alone
if music is a big deal, stuff in 3 pairs of JL M6 8.8 speakers, a couple of their M7 subs, a couple amps, a nice fusion HU, and a rgb controller. with wiring and install, that will run about $10k
so ball park, $33k no sea keeper ride, and $48k with. these are very rough estimates and the price could easily swing $5-10k depending on labor rates