My old B&W DM604s only have a frequency response down to 44Hz, and I definitely feel I am missing some low-frequency information. I'd considered replacing them with full-range speakers, but when I started looking at the cost of true full-range speakers I started wondering if--despite whatever setup hassle a subwoofer adds--it is better and/or more cost-effective to just add a good subwoofer and then eventually upgrade the speakers to something that isn't quite full range (like a Harbeth 30.1, or even Super HL5 Plus) for less than the cost of a true full range pair. Can anybody tell me the pros and cons of these two approaches? While I prefer the simplicity of just two speakers, I'm not sure two speakers can deliver the full range of sound for less than $15,000 (maybe more). Thanks! Edit: The amplifier is a McIntosh MC275, version VI. My full equipment profile has been filled out if you want/need to see the rest of the gear.