Nagra VPS or Tron Seven Ref phono stages?

Both are nothing special. The Nagra VPS is one of the worst I ever listened to. Remove the cover and look inside, there is nearly nothing in it. And the pricing for the additional 2. phono input is real High End :-)
The Tron is the better choice of the two. No real soundstage but loud...

...what about manley labs steelhead or lamm lp2?

These are something different.They do a lot of things right (tone, staging, swing, body, size, time differences...) but of course it depends on you what you expect and demand. The Steelhead is interesting, there is much worse out there. The Lamm LP2 is a unit you will only know how good it is when you know what others do wrong. Lamm offers that one in a - non promoted series for the fanatic low output MC owner - high gain version, 70dB without extra pricing instead of 58dB.... 'nuff said :-)