I have a 2003 Quadvan IFS conversion that I am guessing is close to the Agile set-up (or not ?)
The independent front suspension ride is awesome. I have owned an f350 4x4 solid axle crew cab which had such a rough ride there was no way I was going to have that in our van 4WD conversion. One drive in a QV IFS and I was sold. We chose the sport suspension options for handling - twin Bilstein front shocks, Bilstein rear shocks, steering dampener, correct traks, and rear sway bar. No lift was required and the van sits level (no nose down like stock). If lift was wanted, that was available. We chose not to lift so we could get into parking garages as well as minimizing frontal area for fuel economy reasons. Mainly, was for road snow issues, light trail, and yanking a 5,000lb trailered boat up slick ramps. We have been immensely pleased with the results over 45,000 miles of usage.
Unfortunatley, IIRC, I was advised QuadVan is not doing this style conversion anymore due to lack of parts from Ford, so Agile maybe the next best thing.
A lot depends on what your usage will REALLY be (not what one dreams it might be).