I forgot one thing to mention about balancing the two. This can be tricky because most project studio's don't have monitors with an extended low end. Insert a VU (Waves needle meter, for example) on the master bus and set the master bus fader at 0dB. After you did all the processing on the kick and the bass, turn these tracks in solo and faders down. Bring in the bass till the needle hits an average of -3dB VU. After that, bring in the kick till the needle hits 0dB VU. This gives you a good starting point, most of the time. Have fun!