Time to upgrade!!! Since this is my first mustang and now I am swapping stuff out would like some input

please, researched a bit and realizing coil overs are the way to go what has been the best setup? I see people doing cool overs in front and springs in rear? My car has 50k on it and no abuse it's a "ice cream getter" I want a suspension that is great ride but if I wanna hammer it I don't wanna be all over the road as well and advice? Thanks in advance :joy: oh yeah spring rate? What's best for my application?? Lmao----->:barf: