Again, there is absolutely nothing wrong with bookshelf speakers. Most people would be utterly happy with a pair of KEF Reference 201/2 + subwoofers (RBH, Funk, SVS, etc.).
Same with the 805D or other nice bookshelf speakers.
But it simply comes down to personal preference, nothing more than that.
In terms of towers, there are just so many to choose from (like there are with bookshelf).
KEF, Revel, RBH, B&W, NHT, Salk, Philharmonic, Ascend...there are so many.