You can get the same IQ from both the recent Rebels and the 7D, shooting RAW, they have the same sensor. But the question is how easy is it to get that shot, how high a keeper ratio can you achieve, can you do high speed continuous shooting for sports etc. Do your lenses need AFMA. The 7D also streams higher res video out the HDMI port (though not clean and only 720p).
Rebels are absolutely fine while you are waiting for the next generation to appear, I shot with a couple waiting for the 5D3, and they are nice and compact backups in a pinch or B/C cams for video. Also nice for lightweight shoulder rigs and the newer ones have the articulated screen.
The 7D just got new firmware but it wasn't enough, nowhere near the Magic Lantern feature set for video. It's an old camera now, and the next generation shouldn't be too far off. I would get the Rebel now if I wasn't willing to pay for the 5D3 personally, but if I shot sports or wildlife and needed the reach and fps, the 7D would probably pay off handily over the Rebels.