New ROC, send it to the AP spa or not?

[ceramic1]

Hi guys,

After a couple of months on the lookout I finally got my hands on a roc. It's a 25860 dated 2005 it's in good condition, visually! but with unknown service documentation.

This is going to be my one and only for a while, I also have a leather and rubber strap for it. So I guess I be just fine with just the one.

How ever before I sell my other watches (15300 st, iwc 3714 & Milgauss) I plan to have a full service and polish on this one.
I'm in Sweden and it's about 15000 sek (2000 usd) for a full service and polish. I don't mind paying that, but it's running -4 sec a day and keeps about 40 h power reserv and the chrono is working flawless.
So to the question:
Should I hold of with the service since it seems to be running fine? Or have it done right away anyways, I have no plans on letting this one go so I guess I might as well do it right away.. And start of fresh :)