Hi Taco,
After listening a bit, I decided I will knock down the midrange and tweeter levels about 3 dB and try that out.
My "mobile" measurement setup uses Fuzzmeasure 2.0 for the Mac (Universal Binary).
Fuzzmeasure 2.0 It's not designed just a speaker measuring product, but a little more general purpose than that. (It does other stuff useful to an installer, like room reverberation time measurements, delay measurements (useful for live sound) and CSD plots.
Like Praxis is uses a swept sine chirp convoluted to an impulse for gating and windowing; in the main measurement window it displays both the SPL response and the impulse response in separate graphs for each measurement. You can make and store multiple measurements and graphs in one project file, and you can drag and drop from one project to another, as well as select multiple measurements and create a common graph comparing or adding or subtracting them. Has nice features for graphing, including how it zooms in and allows you to pan a zoomed in area within the window to set the axis extents. It's quite easy to use and has some nice features; it doesn't do any type of distortion measurements at this time. Maybe version 3.0, who knows.
This is an older version pic, it doesn't show the current windowing controls.
I use it with a M-Audio Firewire Solo as the front end, which is bus powered from the six pin Firewire cable. Once you get the current drivers downloaded and installed, it's quite easy to use, has a nice control panel applet. Fuzzmeasure has a variety of inspector panes, including for configuration of the audio channels and hardware.
It's the easiest to use "mobile" setup I've been able to put together. Praxis is more powerful, but is more like flying an Airbus 320, where this is like an agile acrobatic plane with just a VFR instrument set.
~Jon