Matx build to itx in nr200

Hi all,

Recently stumbled on an nr200 on sale, I've always wanted to go itx but never dared to because of the sff tax. Now I'm more comfortable and want to take it on. My current build is matx in a kolink citadel mesh case and consists of the following:

550w ATX cooler master PSU Ryzen 5600x Asus b550-k matx motherboard 2x8GB 3200MT/s g skill ripjaws MSI Ventus RTX 2070 Super 1x m.2 SSD and 1x sata SSD Be quiet Shadow Rock 3

I'm not sure where to take the nr200 build. Not looking to go overboard, I play some eSports titles like cs2, Fortnite and xdefiant and am happy with the performance. I have the GPU undervolted and I play 1080p240hz. I'm thinking of just swapping out the motherboard for an ITX one, get a new SFF PSU possibly the Cooler Master 850W one and some fans and CPU cooler that fits, and keep the rest. Or should I sell the entire system as is minus the storage and start fresh? I'm conflicted