Dave,
Pull the basket and drive hub and check the agitator shaft for a corroded or worn groove (on the sealing surface of the shaft) before you even pull the boot seal. If this happens, the water will go right past the agitator shaft seal (even though the seal might appear to be good), down onto the top cover of the transmission, and appear to be a boot seal leak. You might already know everything is left-hand thread. I have had at least 4 machines that have had this condition. The first was an 08 series (the machine I discovered this can happen on and I almost missed it) and the other 3 were 06's. That 08 really threw me, because I just tried to pass it off as bad parts. Well after having the tub out 2 times, finally the light came on. That's what I found. If this is the case, one of 3 options comes to mind. 1) a new shaft, 2) a replacement transmission and 3) we dont want to discuss.
I just don't want to see any of my friends tearing their hair out, if they have never heard of or have never seen this issue. Generally, it VERY RARELY happens. I even went so far as to say it couldn't happen. But, guess what? Simple physics applied here, and it did. That type of frustration I wouldn't wish on anyone.
Keep me posted and let me know how you do. If you find everything in decent repair, I would pull the tub and do the bearing. Noise or no noise. It's only 3 more screws and a little patience. One thing I would certainly recommend, is to put a very light coat of anti-seizing compound on all threaded surfaces, bearing surfaces, and the agitator shaft. I like to put a very small amount of grey automotive RTV sealer under the flanges of the mounting screws for the tub to prevent a potential leak point, then put it all together.
Best of luck.