I think it's worth noting that these 4.5 Star and above systems are crazy capable...and certainly not "needed" for great bass (LF)!
In fact, I remember when I had just 2 eD A7s-450s:
3.5 Star system. I was super pleased with this system, and some of the best bass I had heard. A 3.5 star system put me on the extreme end of all other HT systems I had encountered. At the time I had some vintage Cambridge PSW12s placed nearfield. They were sealed, and probably didn't extend much beyond 28-30hz...but they still provided some nice shake.
The nearfield had always interested me, and a fellow AVS'r was selling his LFM1-EXs...so he let me try before I buy...needless to say, I bought them. This upgraded my ULF score to:
This was the upgrade where I had thought I had reached bass nirvana...the tactile feedback from the ported nearfield was incredible. Combined with the sealed A7S's, and there was no reason for me to upgrade. I was at 4.5 star 16hz and 20hz, but 3.5 star below that.
It wasn't until I blew a driver with my eD's, that I decided to upgrade. I wanted to not have to 'worry' about pushing my subs too hard, so went the FTW21 route....thought that was nirvana. Then wanted to try the FV15HP because it had been raved about so much, so sold the outlaws to fund the FV...thought that was nirvana...but wanted to get more even shake across all seating, so purchased another FV...you get the picture.
My point is: For folks that don't have 4.5 star systems, your system is not incapable by any means! In fact, I'm sure it's pretty impressive.