Ok, me again.

Just looked at the KAB site. I also looked at the current USD/€ exchange rate. I could get a KAB SL1200 including import duties for almost the same price as a new SL1210 here!

I'm thinking that the power supply and the strobe dissabler are must haves, what else is worth going for ?
Yep, the PSU is an absolute must as it makes a huge difference to the deck's performance. The strobe disabler is worthwhile having, although I've never had the opportunity to compare with and without on my deck. I chose it simply because it made sense as many of these types of light chuck noise into the circuit.

What are you doing about the arm - are you going to keep the stock one and have it modified or will you be replacing it? I can advise on this if you wish and it will also have a bearing on what other KAB mods are worth going for.

Another essential modification, but it's got nothing to do with KAB, is buying a good mat (or mats). The standard rubber one is quite dreadful and simply serves to muddy the sound. You need something which both provides an ideal interface with the record and also completely dampens the ringing in the platter. In my opinion, having tried virtually every mat on the planet, the best combination without a shadow of a doubt is an SDS Isoplatmat in conjunction with a Funk Firm Achromat. You need to use both at the same time for maximum effect and performance.

Apart from that follow the advice from Scoobs and others.

Marco.