Nagaoka MP-500 cartridge

Was recently at a Nagaoka dealer, and they told me the 200 was the sweet spot, but the 500 is very good. I'm not familiar with MM's, but I have theories based on what I have heard from others. Perhaps the MM's (in general) are a little less revealing than MC's. This may be a blessing with average to poor sounding LP's. I have heard very good things about the Clearaudio Maestro. The dealer also mentioned Nagaoka excels on traditional S-shaped arms such as Jelco, Ortofon, SME.... I did hear a Rega MM that day, and it was pretty darned good for $100. Not sure of the model, but I believe entry level. Though I'm a bit out of touch, my guess is I would prefer a good MM over any digital.

Not gonna mention fjn's slur on MM cartridges.  God help any product that sounds good; it will be accused of masking faults.  But anyway, how is it that the MP200 would be superior to the MP500?  As I understand it, the 500 is more expensive and with superior features to the 200.  Could it be that this particular dealer had 200s to sell?  Naaaah.
Of course, I could be misinformed in my sarcasm.  Sometimes a less expensive product entry in the line-up of a particular maker will indeed sound better than its more expensive sibling.  I just checked LPGear; the 200 is less than half the cost of the 500. So it would behoove you to know if fjn's dealer is talking through his hat, or not.

Raul used to like the ancestor of the MP500, the MP50, quite a bit.  That's all I have to go on, besides a great love and appreciation for what MM and MI cartridges can do.  My cartridge bias has reversed; I now think that it's a rare MC cartridge that can meaningfully beat out the best of the MMs and MIs, of which there are many choices.  Dollar for dollar, there's no contest.

That's why I use Goldring 1042 MM for now and don't consider any MC lower than Lyra Delos. But I thought that Nagaoka 500 could be a meaningful step up from the Goldring. 
Nottingham Spacedeck/Spacearm, AcousTech phono stage. Not going to upgrade right away, this is for the future.