Forster. As it has all the extra bits such as inside and outside reamers, hollow point tool, primer pocket cleaner and THREE available base lengths depending if you are a .243/.308 user or a .300 H & H user. And that is always useful. I can even trim .44 Magnum cases on one of the bases as they main parts just simply can be attached an re-attached by unscrewing with no loss of precision of operation.
PLUS you can get a lot of the Forster stuff from new Hannam's or even used off good old eBay!
Some will no doubt go on about the Wilson trimmer. Overpriced and doesn't do half that the Forster is capable of. Waste of time.