Just as well you didn't try for Tri-SLI...the GTX 460 is SLI only (maybe SLI+PhysX) probably nvidia don't want to completely kill off any reason to buy the GTX 480 (for SLI) or the GTX 475 (that's got to be coming since nvidia are dropping GTX 470 prices).
darkty, I'd probably read as many reviews as you can stomach of the available cards if you plan on a mainstream graphics card buy in November, as they will probably all be available (and cheaper) along with some new models.
Some crystal ball gazing might give you an available lineup like:
..........ATI.......................nvidia
HD 5970.............
GTX495
HD 6870.............
GTX 480 (512SP
.........................GTX 480 (480SP)- if still in production (unlikely)
HD 5870/6850.....
GTX 475
HD 5850...............GTX 460 1Gb
HD 6770...............GTX 460 768Mb
HD 6750...............
GTS 450
All in all, a little supposition and a lot of guesswork based on various web news sources- some reliable, and some....not so much. If AMD keep to their usual way of doing things then the high end and mainstream parts should launch first (HD 6870 and 6850) followed by a dual card
IF they can bin enough chips to keep the card under PCI-E spec of 300watts -no small order if ,as scuttlebutt has it, the HD 6xxx series will have a larger die and higher (~200w+) power draw.