Dcc is a must have option, dynaudio on the other hand not so much. it's a decent system, but you might have the trim inside rattle and spoil the experience, i'm on the process of taking mine back so they can sort out the trim on the door cards. even with the bass turned to -5 which is max, at quarter volume still rattles. but if you like listening to music, then go for it. the normal system is decent enough, and in my opinion dynaudio option should have costed 700 pounds max. that being said, you won't regret having it, but will regret the money spent in it.
I don't know how the normal suspension is, but if you go for the 20 inch wheels, DCC is a must without question. The normal camera is good enough and you won't need 360 unless you go in really tight spaces, but if you are a good driver you will squeeze it in anyway. I also went for keyless and electric tailgate, keyless is good, tailgate just a gimmick.
and just as an advice, these cars tank in value really quickly, so i would recommend you look at the used market right now, and pick a second hand one with less than 10 k miles on it that has the 240 engine TDI, or the 280 TSI because they already have DCC and differential as standard and the cost of ownership on PCP would be less than you would pay for a new one.
i have the 240 TDI with rear view camera, DCC(standard), XDS(standard), nav pro, keyless plus electric tailgate, Sunroof, Dynaudio, heated rear sets,20 inch rossario, for 30 k, 4k deposit on PCP 12k miles/year, 400 p/m for 4 years. baloon payment 13k. unless you are leasing the car, this is an option you might want to look into.
By the way, welcome to the forum.