For my money I would take a serious look at FlightLog Professional. It seems this software has a very dedicated following, including me and some pretty nifty features when you get into it.
You can import from 'csv' files provided they are firstly formatted as required ... a bit of Excel macro knowledge could be useful here and there is a typical JAA format report/printout too.
As for technical support, I've been dealing with these people for a while now and for what questions I've had to ask, I've had them all answered within 24 hours ... guess that most likely puts them close to or at the top !
Great,
free PDA/smartphone flight recorder too.
Otherwise I second Kite's comments ... other than the software chosen of course
cheers
RED