I would say , yes it makes sense to buy an upscale conditioner if you have the rest of your system completed how you want it, and keep the conditioner price relative to your system investment.
I recently bought an Audience Adept Response conditioner that litterally transformed an already great sounding system. I am still shocked at the difference this conditioner has brought about.
As usual, one conditioner might sound better in your system over another model.
Cheers