You're gonna be fine with the Jacuzzi WJ. I have one. Several Berks as well that I prefer, but it performs VERY well, kindof impressed with it, really. Friend of mine just bought a Hondo with the AT energizer kit that works well also.
Don't let the horror stories from us bench racers get to ya. The cost vs the benefit of changing to a Berk, and THEN building the Berk to run like the wind? not worth it. Throw less money at the Jacuzzi and it'll perform.
Ray