Neil said:I don't like it. While it does get the 7 out of the picture, I think you are risking a bigger problem 'down the road'. Look at where the 5 and 6 are. Now look at where you need to be for good shape on the 6 to get on the 8. You have a smaller window to get on the 6 properly. If you overshoot it a little, you will have a hard time getting on the 8. You also run a risk of scratching in the side getting on the 6. Shouldn't happen, but the risk is there.
Basically, I don't like how small the window is for position on the 6. The risks outweigh the advantage of getting rid of the 7 early.
I agree with Neil here. I think the best way to put it is, the combination doesn't provide enough of a difference to make it worthwhile. You're still forced to get tricky shape. However, I think it was a very good idea to even consider the combination in the first place. Such a thought process will pay off huge in the long run.