I think that those people who say that LR is fast enough and you won't need insane 2.0=>60mph - they have never experienced 0-100 below 3sec.
I'm driving an M5 F90 Stage2 (around 800hp) daily for 80,000 km mileage already, which gives 2.8 0-100km/h in ideal conditions but is still really fast when you drive even in comfort mode. I can tell exactly that there is HUGE difference in dynamic in one additional second with 0-100 acceleration. It sounds like not big diff on paper, but in fact it you need to feel it once, and you would never forget it.
Consider Plaid as your daily car with an option of rollercoaster
People who experienced M5/M3 once will never go to M550 or M340 instead, never. Because this is not the M philosophy. Here is the same,. i consider Plaid as M version, while LR is just M550
My choice is simple. Yes, not cheap, but c'mon we live just once