I've bought and XP1 and just a couple weeks ago got a XP3 and both came with the media.
There is a faint hum with the XP3 but I only notice it late at night when the TV and everything else is off.
I like that the outflow assembly is very customizeable, I personally use the jet instead of the the spray bar.
I LOVE LOVE LOVE that you only prime the filter once when you first install it and then you just use the lever to disconnect.
I also really like that all the the inflow and outflow parts have different colors and have really simple arrow diagrams where the hoses connect with the filter.
And of course, gotta love the price! Got the XP3 and media, shipping included, for $100.