No one can match the speed of Northstar when it comes to chartplotters. The redraw is almost instantaneous. And the ease of use is great!.
You can't beat the value($) and quality of the Furuno radars compared to N* or Simrad (I haven't compared to Raymarine because my layout calls for a landscape type screen). It goes without saying Furuno makes the best sounders on the market.
I went with the 10" N* 6000i plotter, the Furuno 10" NavNet 1943C radar w/BBFF sounder and a NavNet 1700C in the tower.
Side note... the Furuno Navionics chartplotters were much faster than the C-Map based units. This has been corrected and the speed of both platforms is similar.... It still does not compare to the N*.
I went with the 6000i and the NavNet 1943C