maxel and fork upgrade for sure headset may as well cheaper to do it all now. Brakes for you can but go for the paint mate!!
Ridden my five everywhere from wales to hamsterly dh and the south downs great bike go for it!!!!! I’m sure the south downs is great on a ridgid S/S with you beard gnarling to the max but a five will be fine too!!!! 😆
my one has the pro pack m4 brakes rlc fork and 819’s plus apple green paint lush!