I got the 70A Hasport mounts as well for my B18C swap. The whole swap isn't in,yet. But, when its in, I'll let you know. They are definitely built solid.
I've driven a few cars with solid mounts (a DC2 GS-R with Avid mounts, I believe that's what they were, anyway) and they had a bit of vibration going on, but it's expected with solid mounts that only have urethane in them to allow enough flex to prevent breaking mount brackets. lol.
my DA isn't a daily, anymore. Even after the swap, it'll probably only come out once a week, or so. So, I can live with a solid feeling mount kit when I'm just out for a cruise.