Hi scott.
I have a 2.2dT Grande espace (Earleir engine to the one your asking about) I find to be very good as towcar. The weight of the vehicle stamps it authority on all tehe trailers I have used, and that include twin axle trailers upt to the 2000Kg, limit. The biggest difficulty I have encountered is pulling away up hill on loose gravel, where the vehicle scrabbles for grip, but that would apply to any front wheel drive vehicle. The dci engine has a better reputaion than mine for power so I don't think you would be dissapointed.
I havn't driven a 1.9 Galaxy, but many people also rate them highly (See also Seat and VW versions) and don't forget the Fiat Citreon & Fiat MPV offerings.