Upgrading my Delta 37-190 jointer to a spiral Cutting Head

Greetings, I currently own a delta 37-190 Jointer. I paid around 200 for it and really like the size. However it has the traditional three-blade HSS cutters which if the grain is curly will produce tear out. I was contemplating upgrading the motor from a 3/4 HP to a 1.5 Hp. I can get a good motor around here for 50-100 bucks and spending an additional 300 dollars on a spiral cutter head. I have heard people say that I should just upgrade to a bigger, more powerful machine... but I simply don't have the space for a large powermatic or jet jointer let alone the 1500 they cost. I do have 400 which could get me pretty close. I cannot seem to find an 8" jointer less than 69" long which is again way too big and much more difficult to move around in my garage shop. What are the opinions of this group? Thanks!