If you have the time and $$$ I would almost do the suspension anyway. I bought parts from ECS and then had an indy install them. I have the same amount of miles as you, but I also had a clunk and couldn't get an alignment. I think I paid about $500 total for parts and labor. My indy didn't even charge me for the initial inspection and told me what parts to buy.

If you think the tires are defective, go back to the place that installed them and tell them so. It becomes a problem with the manufacturer of the tire at that point.....unless the tire shop says you have a bad suspension

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2005 x5 4.4i sport