A good full range speaker should work good with or w/o a subwoofer. Some full range speakers just end up being kind of a shame to hand their bass duties off to a sub. Some of the better ones, the lower reaching woofer may have a more potent mid bass, which is often left seemingly dangling by a thread on some of the smaller stand mount or bookshelf speakers. With my own listening style and typical living space, it's larger displacement that ends up taking the fuss out of the low range, or, that transition from mid to sub bass at least.
I have dual subwoofers hooked up. The ideal sonic placement for them is not the least bit convenient. When I listen seriously, I have to move them for the best performance, with one out "in" the room. Basically, a coffee table subwoofer would be more ideal. That's kind of a lot to go through (not to mention the size of them) just for sub bass, never mind what EQ a system often wants to inflict on one's room in which to make subwoofers work.
In my situation, subwoofers end up kind of being the long way around for good bass performance in this not so open floor plan of mine. Kind of sucks to admit it now that I own 7 of them.