for sexyness the Nagra T is the ultimate. chicks dig Nagra tape decks!!!
i owned a pristene Nagra T for 6 months back in the day. beautiful piece of machinery.
but.......find a Nagra T expert you can reach out to if you need help before you dive in. there is little support or knowledge base for those. Doc Bottlehead (Dan Schmale) of the Tape Project here in Washington State is a factory designated Nagra Tape Deck repair person to maybe contact about the details.
OTOH UHA is totally safe and sane. Greg Barron is great!
my 1st choice would be the best Ampex ATR-102 (or nice Studer A-80--2nd choice) you can afford. easily serviced and the upside of the performance is better than either of your ideas. and the dollars would not be any more even for a nice ATR. contact ATR Services to see what it might cost you.