I think Christoffer's advice when you are dealing with these mid-market reels is spot on - don't try to use a fast gear reel for jigging. If you are going to buy only one then buy the PG jigging reel and make do with it for casting - the other way around and you will fry the drive gear.
Kaspar, a lot of the Indonesian guys I fish with use these mid market Shimano reels - the ones which are all made in Malaysia: Saragosa, Aceration, Sustain and dropping down to 5000 size, Rarenium. I have also used all of those myself at various times, mostly by borrowing a set up for 10 minutes when I am out with those guys.
If you are looking at Saragosa versus Aceration, then definitely go for Saragosa. The relatively new Aceration is the one of those 4 models that I have seen most problems with.
I think the 5.2 gearing on a Saragosa 8000 is just slow enough for jigging. The Sustain 6000 and 8000 FE would get the vote for a fast casting reel, and dropping down a size, the Rarenium 5000 is a really nice and great value slow jigging/bottom reel. If you are gonna use a Rarenium for jigging though, be prepared for some flex as it has a carbon ci4 body.