I am flying the DA40 now and that's what I finished my PPL in and working on my IFR now. It's a fantastic airplane compare to all of the one I've flown in the past and I've went through a few different plane to get here.
For the money whether owning or renting...the DA40 is the way to go. Good speed, good payload and burning only 7.5 gal/h at just about 130kts.
I like nice looking airplane...I am some how in the back of my mind believing that a sexy looking airplane fly better!

The one I am flying now is an older model with regular gauges (electric) and Garmin 530/430 package. I mean even that is pretty fancy for an 180hp 4-seater. I do like the constant speed prop action...that's a nice plus.
Handling wise it's pretty rock solid but you'll feel the bumps thought with the high aspect ratio wing...no worst than a C172 really.
I love the composite construction - no panels held together with lumpy rivets is just awesome. I also definitely like the stick and rudder action although that leave you no room to sit stuffs in your lap...I had to buy the new 9-G kneeboards - they're great.
I also flow other with G1000 and that's even better. That's a whole lot of avionic for just an 180hp plane again some people may say. I think that's just the way of the future.
It's definitely a great first time owner plane after all the research I've done. The new model comes with the power flow exhaust as an option (CS) supposedly even faster.
Ryan