Just a thought, from someone who knows nothing about Pure Motion, so I may be about to do it a major disservice. The great thing about Premiere - and I'd be surprised if Premiere Elements didn't do everything you want (check out the free trial) - is that its popularity means there's a huge infrastructure of informal support available. That may not be true for lesser known software, technically wonderful as it may be.

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Premiere Pro, Encore, Photoshop, Ulead VS6, WXP Pro, Core 2 Duo, 2GB, 2 x 250GB SATA3 drives, 2 x 250GB USB 2 external drive, DVD writer, GeForce 7300 GS 256MB

The biggest fool can ask questions that the wisest man cannot answer...