I went the same route upgrading the same machine to a Grizzly 15”. The helical head has the cutters oriented straight and it does a fine job. My jointer I upgraded with a Shelix and the difference is minimal but noticeable on narly woods. Difference between starting sanding at 120 or 150. Maybe save up one more year and get a jointer planer combo. One an done unit that’ll last a lifetime for a hobby. Take a look at the Hammer line.
My woodworking theory: Measure with a micrometer, Mark with chalk, Cut with an ax.