Not sure you can go too wrong with either, Nexus 1st gen was the really 1st good value tablet, it's 2 incarnation being not quite as great value but still very good & many rate it as the current best 7" tablet available. I think the Samsung Tab 8 is a lovely bit of kit and a really great screen size, I'd not worry too much about the spec if you aren't going to be playing games, as browsing or watching iplayer et all, should be handled easily. The initial reviews of the Samsung slate it due to a much higher price (now reduced), a 'plastic' feel (which only you can decide on - I've fondled one and really liked it), and the lower spec. As both are around the same price now, so I can understand your confusion and "I" would be just as torn, but I suggest the Tab's lack of spec matters very for your use everyday use.
I have an ipad 2 (or 3?) and I simply don't fill it like I do my phone, you stick a movie on it.. watch it take it off and load the next, where-as my phone is filled with music I want to carry round all the time (just incase I need 1000 hours of music to hand).
...but I can't see me replacing it any time soon due to hardware limitations (as I don't play game or use many apps).
Oh and RM, I'd buy the Apple mini over the air... the air is nice but the mini is gorgeous.