A new GTI isn’t a bad retirement present to yourself
Congrats on retirement you lucky devil!!
I have CM replicas in the same width and offset albeit in 19” diameter.
I went for TCR Reifnitz replicas as they look a bit stronger than Pretorias (having owned genuine VW sets of both wheels I can confirm OEM Pretorias like to bend!), are a more GTI wheel, are rarer and have a little bit of dish to their shape.
However I’m a huuuuuge lover of Pretorias. One of my favourite ever designs of alloy wheel.
Yes, they will fit fine in that size and offset plus fill the arches better.
Yes, you will need new centres but only the badge caps that are easily available on eBay for not much money as per Ceefeesh’s very comprehensive post.
Yes, you can still use your original bolts, lockers and nut caps.
Yes, the standard 225 tyres will fit fine but there will be a tiny bit less kerb protection than 235’s and the wheels themselves will sit slightly further out and thus nearer kerbs.
After several decades of buying expensive higher end wheels for my cars, I went for the CM replicas as they were well rated by other owners, plus at £500 a set I wouldn’t be massively upset if I bent one on a pothole.
After two years and circa 17k miles they seem to be holding up just fine (touch wood).