As I said, some learn from the mistakes of others and some have to repeat the mistakes.
In case you haven't come across it yet, the hot combination for good performance, life and safety (meets BMW requirements) is Metzeler 880 on front with 42 psi and Bridgestone BT020 (bias REINF version) with 48 psi. Other combinations work, such as all Metz or all Bridgestone, but you get shorter life either front or rear.
The earlier LTs, I think 2005 was the year the front suspension geometry was changed, can run radials, but bias only for 2005 through 2009. I am going on memory, but if any of this is wrong I am sure someone will jump in to correct.
I ran all Metz for the first 4-5 sets and got 17-18K front and only 7-8K rear. I recently wore out my first BT020 rear and I think it went about 13K miles (need to check my spreadsheet and post the numbers sometime). I am running all BT020 now for two reasons. One, I want to see how much shorter the front tire life is with the BT and, two, I got a really good deal on the matched set.