Rogue Audio Perseus vs Perseus magnum

I have purchased a Rogue Audio Perseus (used). I was considering having the factory magnum upgrade done on it. I was wondering if the $525 upgrade was worth the price. Will there be that noticeable of a change from the stock unit? Thanks
The Perseus Magnum is a major improvement. It shares the same Caps and wiring as the 99 Magnum Pre and a much larger power supply. There is a tremendous difference in dynamics between Perseus and the Magnum. Also a much smoother, natural presentation; I found my Perseus had a bit too much of a SS sound.
$525 seems like a lot for the upgrade, but it will bring your system to a much higher level.

Also tube rolling on the Perseus is very effective. I would recommend not using Rogue's stock tubes.