Re: Nexpress vs Indigo
The Indigo can impose on press, but only simple 1ups/2ups/4ups etc..
It cannot impose a saddlestitch book with bleed which is pretty crap, but to be honest it's better to do this at the prepress stage anyway, so all the print minder has to do is worry about which job to print.
We rip jobs to PDF first, then use ALAPs Imposer Pro for most saddlestitch books - works fine and really quick, although not as powerful as something like Heidelberg's Signastaion which we used to use.