ATC speakers fit your bill exactly - second hand you may find a 50 or 100 close to your price. Much more dispersive than most other speakers (soft dome tweeter, 3" soft dome mid range).
I assume you don't want a reflex port because you worry that it will sound boomy below the port tuning or "chuff" with air movement at high levels. No worries....ATC's reflex port is NOT at all tuned to augment bass extension as in almost all other designs. The reflex port is tuned to control/protect driver at ultra LF and allows the use of a more efficient driver for high SPL and greater dynamic range.
If it is an aesthetic thing that you don't want a reflex port then the smaller ATC models don't have them (SCM 40 and lower)
I assume you don't want a reflex port because you worry that it will sound boomy below the port tuning or "chuff" with air movement at high levels. No worries....ATC's reflex port is NOT at all tuned to augment bass extension as in almost all other designs. The reflex port is tuned to control/protect driver at ultra LF and allows the use of a more efficient driver for high SPL and greater dynamic range.
If it is an aesthetic thing that you don't want a reflex port then the smaller ATC models don't have them (SCM 40 and lower)