While I agree that ipad2 is fantastic,I love mine I prefer my mbp for long periods of browsing,a proper keypad is much better,also you need a disc drive at times,You can't beat the speed and reliability of the gorgeous mbp.
I agree, if I'm doing any long amounts of browsing and I'm at my house I will use my MacBook connected to my External Monitor.
But the iPad is great when you just want to sit on the couch or in bed and look some stuff up and don't want to be bothered with the weight of a laptop.
yes,i always have a couple of hours in bed with my ipad2,this is why apple are the market leaders,theyv got it all covered.