I discarded the Ortofon Blue MM almost immediately. I found it a bit too bright and forward for my listening setup. Try going HEAVY on this tonearm (be sure to add the additional weight they provided if you can find it).
Noticeable Improvement/Same Money: Nagaoka MP-150 on stock headshell gave me the same liveliness as the Blue but with a bit more punch and grip.
Vast Improvement/Big Money: Dynavector DV20X-low on stock headshell is silky smooth, detailed on a huge soundstage. Great for complex music. https://www.dynavector.com/products/cart/e_20x.html
Killer Setup: I am blown away by the MoFi Master Tracker MM on My Sonic Lab SH-1Rh headshell. It seems like the Stealth tonearm responds really well to a hefty cart. I will stick with this for a while. It tracks and grinds on gnarly old vinyl and grooves and slams on fresh stuff. Really really good.