What are the most balanced relatively neutral cartridges at each price level ?

Not my reference point, never was even back in the day when I had tape decks and recorded live bands.  For me references are musical instruments, performances, people I am familiar with.  I know what a Yamaha C7 sounds like and if in doubt I can listen to the one that is in my listening room.  I know what K. Zildjian cymbals sound like, my Ludwig drum set has two rides, one crash and a pair of hi-hats sitting right beside me.  I go to live performances regularly, have perfect pitch. Know violins from violas and can tell when someone is out of tune.  Frankly I don't see anything wrong with using digital references.  Master dubs on the other hand I have a problem with.  Where did they come from?  What mics were used?  How many mics?  What kind of a mixing console?  Who was the engineer?  It is hard to know some times.  Might be good, might not.

I have an Ortofon Winfield and agree it doesn't seem colored in any way in my system......(all Ayre with Vandersteens)

I got it. It's Ortofon. So, yes, there is an answer to this question. Demagogues and dilettantes don't have answers and even don't understand questions, pros do. Thank you.

Various Ortofon models are certainly good choices, but, it is hard to say that the tonal balance is neutral.  Most of the lineup below the very top cartridges are warmer sounding than average, but does that make them not as neutral?  At whatever price level applies, I like the Quintet Bronze.  I tend to like the Bronze models in each lineup more than the higher priced Black model (Black models tend to be a bit thinner and a bit harsh, although they do deliver extended highs).
 

Again, not having any reference, I would call most Lyra cartridges not as warm as Koetsus, for example, but I cannot say if they are more or less neutral.  I like several models even if they are not as warm as my ideal.  I own an older Titan, although I am currently using a Transfiguration Orpheus L (a slightly warmer cartridge).  If I thought the Transfiguration is closer to the ideal tonal balance, it would be my choice for being more neutral, but someone preferring the Titan would rhink the opposite.

Audio Technica makes an extensive line of cartridges that I think compete well across all of the price levels set out.  As I mentioned earlier, I am impressed with the AT ART 1000 model—not as warm as a Koetsu, but warm enough for my taste and it sounds great to me; it even impressed a couple of Koetsu owning friends of mine.

Stringreen,

The least you can do is get the name right.  Ortofon Windfeld.  I agree with you it is a very nice cartridge.  One of the best.