As am4, i was thinking more 2nd hand for the parts...just had a quick look on mktplace and you can get a 5800x for £90. I def wouldn't buy anything below a 5600 am4, i think the 5500 and below are somewhat gimped, and would go intel 12th gen if going that way, as
@Tetras has put above. mobo's you just have to be patient, put £80 should get you a decent one, and you can get teamgroup vulcan 32gb 3200C16 for £60 brand new on OCuk, 2nd hand you should get for £30-40 (actually seen corsair vengeance lpx in that price bracket now) ...£220 for a 4500 with 16gb ram is too much to spend I think
the teamgroup delta 6000C30 is good value at £109 for OCuk. it's not expo but it constantly sells out quickly and they're been no real reports of it not working...if you want to stick with corsair or gskill, I'd look at buying elsewhere...for example elsewhere you can get corsair vengeance RGB 32gb 6000C36 expo on offer for £105.38 or £121 for 6000c30 (both of which ar £139.99 below)
The lian li 215 is 3 years old..can take a 240/280mm aio in roof but that's it..the 216 that replaced it is longer and can take a 360mm aio, and by default a longer gpu (they redesigned the 215 as a 4090 wouldn't fit in it, and also better airflaw) ...it's better quality that the phanteks but more expensive...you'd have to jump up more towards the NV5 for that, but that comes without fans, so would be additionsal costs so to speak
The phanteks xt view is same chassis as the xt ultra, but glass at from and fans on side...again can take a 360mm in top, and as a guide, that and the ultra can actually fit a gpu up to 420mm in length..the 215 is 370mm i think
My basket at OcUK:
to add prices and links..put everything in your basket, then go to your cart...at the bottom of the cart (after you scroll past the insure your products etc) will be a a box with '<>BBCODE'. click that, another box comes up with your contents..highlight it all and copy...then in the forum paste and in the top right of the typing area you'll see some icons..1st is an anticlockwise arrow, then clockwise..3rd in a black box...after you've pasted hit that and it'll change the text pasted to above...hope that helps and you can follow