Great info luke. In our experience the quality of the wheel seems to have more bearing on balance than the tire. I don't know how many times we have taken tires off wheels that had little or no weights on them and when we put the new tires on the weight required is usually close to being the same. Even to the point of being close to the same location. Does this make any sense to you ?

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95 SL500 Smoke Silver, Parchment 64K
07 E350 4matic Station Wagon White 34K
02 E320 4Matic Silver/grey 80K
05 F150 Silver 44K