I have XM only because I wanted Opie and Anthony.

You should go online and compare the line-up to see what suits you.

Like others have said, it may not matter if the two actually get approval to combine.

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2008 BMW X5 4.8i (E70)
Alpine White, Burl Walnut, Nevada Black, Sport Package, Cold Weather Package,
Premium Package, Technology Package,
Rear Climate Package, iPod adapter