I did see a 1Ds, but figured it would be too ancient. Besides, it's too late. When I said "Add to cart, buy", it wasn't a figure of speech. The order is sitting in queue somewhere deep inside Adorama, right now.

DxoMark says I should expect less noise too. Yay! I wasn't sure if I'd get the noise advantage of full frame, due to the age of the sensor and processor, but it looks to be around an ISO stop better at both luma and chroma. Seeing that helped remove some of my "Oh my god, what have I done" jitters.