leather sofa , buying guide help needed

[silverdale]

After 12 years and 3 kids are leather sofa has had its day so were on the hunt for a new 3 + 2 . the last one cost over £2500 all those years back but it was a full grain leather (black) but were unsure what to buy this time round the only thing we want is it to last anywere as long our old sofa.so out of the leathers below which would be best to serve our kids best ? :-

aniline,
semi-aniline,
top grain,
corrected top grain.

i dont want it to easily stain as were looking brown/tan leather this time round and if we should buy a pocket sprung sofa.
any advise which be greatly appreciated.