I agree B-lunist.

If I were still on staff and asked my opinion (which I wouldn't be) as to if we should buy the TPL license or litigate, I'd bias towards buying. Too many big companies had their legal staff do DD and then they bought a license. Sure my company would add some DD of our own, but with little chance of coming up with something new.

However, if the asking $$$ were large I'd suggest that we find ways to delay. We might argue our design implementation is different and does not infringe. Since Moore's patents primarily address architecture (not specific implementations) we'd most likely fail to win that argument - but it could afford us some delay of payments. 

PTSC & TPL are in a VERY strong position.