That is a tough call. Really only your ears can tell you for sure. However, there are many who believe that Bose is more marketing than performance. Still other like them and are very satisfied. However, the Kef 3005 have a long history and are very popular speakers in that style.
Again, only you ears know for sure, but I think most would give the edge to the KEF.
The current KEF 3005 SE are about £800/set. The Bose Acoustimas 10 are about £750. If that is the style and size speaker you want, then fine, but for that money there are many other, though larger, speakers to choose from.