Hi!
I've never used QXP. But I've used Page Maker and InDesign (CS2 was powerful enough to provide everything I needed at that time, but now it is very old and I can run it only on a virtual machine) and for more than a year I use AP. I have paid for it! But I am half happy...
Unfortunately, two basic but very important things still misses: table across multiple pages and footnote/endnote management (and this two are crucial in DTP!)...
Six months since the last update... Maybe with the next update? Hope, at least one of them...
Until then, what was the name of the open source DTP software?