My personal CD favorites are:
Copland: Appalachian Spring, Rodeo, Fanfare for the Common Man. Louis Lane & Atlanta Sym. Orch.
Mahler: Sym. 1 "Titan", Leonard Slatkin, St.Louis Sym. Orch.
Respighi: Pines Of Rome, The Birds & Fountains of Rome. Louis Lane & Atlanta Sym. Orch.
Telarc also has a great sampler titled: Winter, Spring, Summer and Autumn which is worth the price.