It's hard to go wrong w/ QRX Or SRX, but have you looked at Looked at Turbo TDX? The reason I suggest is they come in a 60 degree horn. Another spkr that I've had wonderful results with is the Community SLS stuff.
You'll want some subs but that shouldn't be a problem with your moderate volume requirements.
I recently did a 2000 seater with a blues act with a pair of the TXD turbo's and some Peavey sp 218 subs. That's a 90 degree horn w/ 3" voice coil per side for highs, 2 15's w/ 3" voice coils for mids per side and 2 18's w/ 4" voice coils for lows per side. A dbx driverack and 2 QSC PLX 3402's for power. Bi-amped between the subs and tops and crossed at about 80 hz. Eq to taste and no fancy settings. Almost too easy. All happy- muso's, promoters and me. Not the loudest rig, but a full rich quality that pleased all.
-Oh, A &H 2400 out front. Happy sailing!