I haven't tried that Hitachi Tom, but I do know someone with a 10" one and it produces a brilliant cut, better finish than my Kapex. I nearly bought one but they had discontinued the 10" and gone up to the 12", which was much more money, and I got my Kapex second hand for about £350 plus vat. Sometime I still wish I had tried the Hitachi you are looking at to see if it is as good as the 10". The cut on the 10" was so clean that hardwood end grain mostly didn't need planing, you could go straight on to sanding with about 150-180 grit, and for mitres the cut is good enough to glue together, with the Kapex I often run a hand plane over the cut if I want a really good join. It does have a little more movement in it than the Kapex on the arms, but the arms on that 12" look much more substantial
Johnny B