Along with the previously recommended Antal Dorati Respighi recordings, here are some of my favorite alternatives.
Reiner and the Chicago SO perform Pines and Fountains and are backed with a wonderful ‘La Mer’ from Debussy. A Classic recording.
Ormandy and the Philadelphia include the Roman Triptych: Fountains, Pines and Festivals on an RCA collection:
If you are interested in getting most if not all of Respighi’s Orchestral works, Brilliant has a box set of 8 cds or on download of about every work he wrote. The performances are newer and just fine. At this time the MP3 version is a deal too.