I also disagree with Loontoon. Proper line conditioning has more to do with the dirty AC current that is a universal problem to everyone on this planet.
Of course the better your equipment (assuming the vendor has not attempted to 'condition' the AC by suppressing offending frequencies), the more one should appreciate what proper line conditioning will do for the sonic presentation.
In fact, I can't imagine any system truly worth listening to without proper line conditioning. It's that fundamental and it's that foundational.
Although price rarely matters, from what I understand, most line conditioners aren't worth owning. Most will either induce their own harm, limit current, or even do nothing.
I've been using Foundation Research LC-1s and LC-2s dedicated and passive in-line power conditioners in my system for over 3 years now. Marty DeWulf of Bound for Sound reviewed these (the old versions) and simply called them the best he's ever heard and purchased the review samples for his Big Rig.
I've owned the new versions for 6 months and, believe it or not, the new versions are far, far, better than the old.
So to answer your question, $1300 would get you a couple of LCs and assuming your system is fairly well put together, your benefits should be nothing short of substantial.