Ānāpānasati (mindfulness of breathing) -- concentrate on nose, or on whole body? I am meditating for the last three months, about 30 mins a day (or a little longer than that). I followed Ajahn Brahm's "Basic Method of Meditation" to bring the mind to be in the present relatively steadily (still it wanders, but not like when I started the practice). I started with trying to quiet the mind (too much internal thought etc.) by keeping my attention sometimes on the breath, sometimes on a sound without strictly sticking to a single meditation object. My understanding of Ajahn Brahm's description of the first stage was to bring the mind to the present and then make it quiet.

Now I am kind of there, I am trying to figure out how to proceed. Meditation books recommend keeping your attention at the tip of the nose, but my mind is naturally drawn towards knowing the breathing as a whole (through most parts of the body, chest area, belly and sometimes the face also). I tried to go back to paying attention to the nose, but it made the meditation really hard. When I came back to the whole body experience, it was easier. Just wondering whether I am doing this wrong. If so, how should I proceed?

I am particularly interested in knowing whether this way of meditation is what Buddha mentioned in the Satipatthana Sutta when he says: 

"'Experiencing the whole body, I shall breathe in,' thinking thus, he trains himself. 'Experiencing the whole body, I shall breathe out,' thinking thus, he trains himself. 'Calming the activity of the body, I shall breathe in,' thinking thus, he trains himself. 'Calming the activity of the body, I shall breathe out,' thinking thus, he trains himself.
The way I understand the object of Anapanasati is the breath.
So, Keep your attention on the breath whichever form is presented.