I own all three, and the PS3 would be the last one I'd part with. I am very happy with it, and it was well worth the money. I could care less that its in "3rd place". Doesn't seem to hurt its rolling games lineup, and that's all that matters.
The 360 would totally be my favorite if... it played BDs, and wasn't known for scratching discs, and its upscaler produced better results, and I didn't have to pay for online... etc. Entry price aside (I couldn't care less about entry price), the PS3 kicks the 360s tail, in my book. The Wii I bought for the kids, although I'm gonna sneak out and buy those JRPGs it has coming, when they finally hit US shores.