Steve,
I think you are right, use what you feel is good for you, I tried the Ipad and it will work and do the job, after the MPP which has gone back to the USA for a fix, it is small, if you buy a stand that will put the IPAD closer to your face you could live with it a bit better. The price is high when you see what's coming, DEL, Fujitsu etc etc, the quality will go up and the price down and you can get almost A4 screen for less than IPAD. I will wait until my MPP comes back, the battery life will always be crap I know that.
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Tyros 4/Pair SR 350/ PC with a i8 intel chip, XENYX 802, Ford Focus 2 litre/Tascam DR07/Brother printer/Designjet 500/ our Doris/5 Grandchildren/ white boxers short Kymart shipped over and Typhoo Tea Earl Grey