Don,
Generally your tank condition is alright for apistos. They wouldn't eat the tetras, PH is OK.
There are so many varieties out there, for starters maybe a pair of Ap. cacatuoides or Ap. agasizii. But it's better you check out the variety that is available, then pick the one you like. No point ending up with a pair that you don't like.
Read some of the threads here and get a better understanding of Apistos before committing.
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