I just wanted to make mention of two cool things you might like to know. One, if you're going to use a midi keyboard for tapping, check your latency to get as close as you can and choose the down beats that are going to quantize easier if you decide to do so.
I did some beat mapping with Logic and I was in need of some assistance on sorting out all the right places to check for a good beat map so if you can, record a tick to make it easy to hone in with. The latency was some what problematic so do your best, the absolute minimum should do fine. Also, Tome Rice shows you how to record your keyboard and check the latency of it to your recorded signal. So all in all, I would highly recommend checking his video for Latency awareness.
That would be Logic 207, Latency tool box with Tom Rice.