You'll find that all the Nagaoka cartridges sound pretty much the same, at least I do. I have three. They are very engaging, and throw a wide believable sound stage. They remind me quite a bit of my Denon 103. Not nearly as fast or dynamic as most cartridges today... the basic design is nearly 40 years old.. but a very rewarding listening experience. Nagaoka's are probably my favorite cartridges. Try an MP 11 (MP110) if you don't want to invest in the 500 and see if you like it. You might be pleasantly surprised. The Boron models are the sweetest.
