The XLR socket is a non-factor if you get a transformer cable. I had one made, so the end jack is not so large and sticks out, but you can get around that problem with a 90 degree cable end, so it lays flat against the back of the kb.
As for pedals ... that's always going to be a personal choice. I find that 2 is all I can handle - one for sustain and one for harmony. I'm so used to triggering fills and variations with my hands - I'd rather not complicate the process by adding more bulk to the rig.
Between the 2 foot-switches, and the 3 assignable buttons ... I get all the fast change I need.

The line input would be huge, so I didn't have to use an outboard harmonizer to get the guitar, trax and vocals all through the monitor speakers. This is old news .... we've said it all before, right?