$28 is a pretty good deal for the low-output version of Grado's $500 cartridge.
You stick a Soundsmith rube cantilever and line stylus on it you should be making splendid sounds (providing you have the requisite gain to propel it's 0.5mv output to volumes you can live with)
The Prestige Series (like the Black and Silver) and Reference Series (the wood bodied series) have about 4.5mv output and 45mh inductance and 500 ohms resistance.
The Statement Series (the same wood shell as the Reference series) houses different internals with less windings on each coil and, correspondingly, lower voltage, inductance and resistance figures. As you noted, it needs another ~20 db gain with another active stage to get it to volumes needed.
Grado recommends 47K loading for them as well as the higher output cartridges...but they probably respond better to something in the 2-10K range.
I've not heard the Statement series myself...but my favorite cartridge is a low output (0.33mv) Pickering with similar specs to the Statement Sonata you now have. The lowered inductance and resistance should give you some of those moving-coil-type goosebumps that proponents of those designs love...with a large dose of naturalness that those designs typically fail to provide.
In all, it may provide a best-of-most-worlds experience for you

Good find
John