Really though, New Order have been synth pop in name only after PC&L and the the Arthur Baker singles. Even PC&L had its share of guitar-driven tracks (two of their very best as a matter of fact).
Iris were my favorite neo synthpop group, but they disappeared after the electroclash fad disappeared off the face of the earth. Get a hold of some tracks off Disconnect and Reconnect.
Wolfsheim is an older group of synth purists who effectively merge Depeche Mode style sound washes and krautrock vocal stylings, that is to say, less voice emoting than Bernard on Movement. My favorite two tracks of theirs' are Once in a Lifetime (no relation to Remain in Light) and Find You're Gone.
Tribeca is emo-meets-Depeche Mode. The faux-twee vocals and lyrics as popularized by the spotty Architecture in Helsinki, sum up everything I don't like about today's off-kilter indie synth pop fads. That being said, the actual composition and melodies on their album Dragon Down are catchy as hell for the most part.
I've heard a lot of hype over Boards of Canada being something along the lines of the next Postal Service. I haven't heard them, but i'm mentioning them as they sound along the lines of what you're looking for. Myself, i've never been big on the whole ambient music thing.
I like Les Rythmes Digitales. Be forwarned however that they used sampled vocals and have a slight dance edge.