I always though I would hate the look of a bow front until my sister set 1 up...the extra room in the center was great for aquascaping,and like already stated,the curved glass seems to magnify the view without distorting it...
IMO,lighting isn't an issue because your aquascaping is pretty much in the same location as with a rectangular tank and the lighting is basically in the same orientation,you just have added room in the front for fish to swim plus you get the slight magnification of the curved glass....
I still prefer a rectangular tank simply because it's easier to build your own tank and stand
but I do like the look of a bow front,if you're good with wood working,you can build an awesome looking stand and canopy for a bow front,it is just a bit more difficult