perfect jet - although almost impossible- for me would have to be
1) fast - acheivable by hydrogen PDE ramjet engines + delta wings + slim design
2) quiet - acheivable by using the F117 style engine exhaust mufflers
3)super cruise
4) vtol/stol (vectored thrust)
5) stealth (no right angles in design + radar absorbing paint)
6) manouverable (vectored thrust + canards + sweep wing)
7) tough (armour)
8) packs a punch (massive load capabilities)
9) cheap ( new fules/ materials)
im bored now so im just gonna say -----the perfect jet must be everything
ie, the alleged Hypersoar / aurora jet but until its shroud of conspiracy is lifted , we have nothing.