I figure I should jump into this thread too, as I have been part owner for over 6 months too. Arylia v2 is about 2 years old, but is still a very solid script. Gallery Daemon is more with the times have nice features such as bulk ripping. But Arylia v3 is coming soon and with it will have all the old quality features you've come to love over the years/months/whatever of using it, but will also have many new features such as bulk ripping, additional movie support (arylia v2 is embedable movie compatible now), categories, and more.
Before I became a part owner of Arylia, I owned (and still own) the most licenses out of anyone, so I USE this script and a I use it a lot. It works and it works well, and I use it on both picture and video sites. Arylia's hybrid galleries are fuckin sweet
And judging by amount of search engine traffic my galleries pull in I'd say Arylia makes some excellent SE compatible galleries too.
Feel free to hit me up with any arylia related questions at 295-369-830.