To be honest, I would get everything Jeppesen. Both the VFR and IFR stuff (assuming you have an IR). It might be a little more expensive, but it's good, up to date and standardized across Europe. It's also based on the same database that's in your GNS430, assuming you have one in the DA-40. (Are there any DA-40s out there without a 430 or better?)
The only thing I'm not sure of is whether Jepp does any reasonable-cost PDA-type solution. OTOH, you have a 430 so why would you need one? They have a few different PC solutions so that's what you would use to plan your flights when you're not in the aircraft.