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For beauty and overall docility, I'd go for Bracypelma emilia or Grammostola pulchripes or Grammostola sp. 'Concepcion'. If you're flush with cash- G. pulchra!
Otherwise, I'd try Lasiodora parahybana or Acanthoscurria geniculata. Both big, striking, bulletproof, though I wouldn't personally...
So you have a useful system. Minimizes a lot of uncertainties and potential problems. New T owners often not aware if the advantages of keeping relevant records.
In retrospect, knowing when and what size the T was when acquired would becuseful. Didn't need to when my collection was small, but it ballooned and I didn't change. However, slings that I've produced get dates of birth.