The absolute best bang for the buck in charting is via a tablet and app as youre using. You didnt mention your transponder, but if youve got a new Garmin GTX 345, youve already got some connectivity between the iPad and GNS430W. Otherwise, you might consider a Flightstream 210 for that connection to exchange a lot of data between tablet and navigator.
Tablets with apps like ForeFlight offer the best "bang for the buck" for displaying actual IFR charts, as many panel-mount MFDs primarily show raw map data rather than full charts.
Exercise caution when using GPS OBS mode due to potential magnetic variation errors; programming legs directly between fixes is generally recommended for more accurate navigation, especially over long distances.
Maintaining pilot proficiency is vital, achieved through a deep understanding of complex avionics (like autopilot system interfaces), active participation in programs like FAA WINGS, and learning from accident reports.