I think you want a Rocktron Banshee and a Les Paul. If you get those two items, you'll probably get exactly the sound you're looking for. A synth and a Banshee would sound more like Daft Punk.
Sometimes the organic solution is the best one, some of my best whooshes were done with my mouth making wind noises with a bit of EQ and reverb, filter? shmilter!. :)