In my opinion the genesis coupes interior is not more flashy at all ..I prefer the coziness of the BRZ and the nav is very nice.
The interior is like driving a boat. There is tons of leg room ..which is great for my friend who is a hard worker and has back problems. But it feels huge and barren and the center console is too cluttered with shit.
I plan to install the Oem audio Plus kit so I want to stick with factory nav, as much as I would like to have an aftermarket headunit to coordinate my track data logging apps on my phone on my cars screen ...id rather deal, and experience the plug and play audiophile setup