I will second the Adcom GFP-750. It's a lot of preamp, offering excellent performance for the money (particularly if purchased used). My second choice would be the Marsh.
If we depart from your list, however, you should seriously consider the Bryston BP-25. There is a new listing here on A-gon for a BP-25 priced at $995. I would choose the Bryston before any of the preamps you listed.
If we depart from your list, however, you should seriously consider the Bryston BP-25. There is a new listing here on A-gon for a BP-25 priced at $995. I would choose the Bryston before any of the preamps you listed.