Maybe worth keeping yout PSR3000 and getting a synth module midied up to it if it's only the new age sounds you require. The Triton as Carrie mentions is great for new age synth sounds and pads. Keep your options open m8.
The G70 along with the T2, SD1, Korg PA range, Genesys etc all offer the usual run of the mill styles and sounds but don't have many new age styles for the genre you mention. If you intend using sequences for this type of music then I'd say stick to a synth rather than arranger.