That's the 'If it ain't broke, fix it until it is' syndrome, which is probably the defining characteristic of most of us audiophiles. No matter how happy we are with our systems, or how much money we've poured into them, we worry that there might be something better. So we try something else, and then something else...
I keep two ideas in mind:
First, I've only heard one system that ever made me think for more than a moment that it might actually be real people playing real instruments (to give credit where credit is due, it was at Take Five in New Haven CT back in 1982 or 3, and was a pair of the first Vandersteens with Mitch Cotter electronics - I don't know what the source was). It was a jazz recording, and it was the precision of the imaging that astonished me, but I'm aware that in reality, very rarely can you locate every instrument precisely. So the recording may not have been actually realistic, as alluring as it was.
Second: Many of the most pleasurable listening experiences I've had have been with pretty mediocre systems. And I'm not just talking about college systems in the 70s with beer and cheap weed. Our emotional state has a lot more to do with our perception of sound than we like to admit - being brought to tears while listening to a piece of music (which I hope happens to everyone) is, in my experience, rarely related to the quality of the system listened to.
If you want more bass (and who doesn't?) get a really good subwoofer - my experience is that hearing the air in the room (which isn't at all the same as lots of thumpathumpa but does require low bass capability) is very convincing.
