Of all the speakers you mentioned, as bookshelves, nothing is going to produce astounding bass on its own, but I would urge caution in seeking something that focuses too much on the top end because your sub isn't really designed to do as much work above 100Hz. At that point, you also get the effect of localization, where you can start to hear the sub as a distinct source, instead of it being "invisible."
For all the questions and speakers, have you read reviews for them? Not that the reviews are the best source of answers, but when you can't physically go to that speaker, they can help put the sound in perspective for you. If ELAC is compared to KEF, say, you might be able to audition the KEF and judge the sound of that and compare back to the description the writer gave of the ELAC. Dig?
Its all good and well to ask us our thoughts, but everybody is going to experience things differently. A friend here asked me about my subs, which I've been super happy with... He decided to buy them and is having a different experience! Hence a saying that gets dropped here a lot: Your Mileage May Vary.
Wharfedale, Canton, Cambridge, and ELAC... I think I've heard the strongest pros voiced for Canton and Wharfedale over time. When I was researching my speakers, I recall a lot of solid praise for the ELAC debuts, too.
Cross reference those three spekaers, and if possible, since they will be your mains, I would urge that you consider looking at the larger of the bookshelf offerings if in your budget, so the Canton 436 over the 426, ELAC 6.2 over 5.2, Wharfdale 10.2 over 10.1... you will get, IMO, a better overall SQ from the larger boxes. Not always the case... again YMMV
