Gyrodec and spacedeck platter upgrade kits

 i have recently auditioned both decks and was considering them both and was happy that they have platter upgrade paths available. since then doubt has reared its ugly head and i am unsure whether the kits are just a halfway measure to the next level (eg hyperspace or orbe). have any wammers any experience with either platter upgrade - how effective are they ? my other option would be to get either the orbe or hyperspace and a cheaper arm as a starting point.