Good points by BD. I have quite a few LL MIDIpaks, including the Linear volumes.
I would also take a look at the Long Loops volumes. There are four different ones at the moment (I have all 4). Here's the link to the bundle (50% off):
http://www.thelooploft.com/collections/midi-loops/products/long-loops-bundle I found these to be easy to build song ideas around. There's a really good variety of different styles spread across the 4 volumes. With the bundle discount, plus your $10, you could get all 4 for $48. That's a real deal. The previews on the bundles page are quite helpful.
Add the Fills Unlimited volume (LOTS of interesting 1- and 2-bar fills in both straight and swung styles), and you can put an awful lot of song ideas together with just those two subsets of the LL MIDI library.
http://www.thelooploft.com/collections/midi-loops/products/fills-unlimited-midi-drum-loops Have fun making music!