GPS Recommendations

So my old GPS is finally beyond hope.  It has fallen into a state that can only be deemed useless, and I need a new one.  I'm hoping to get some recommendations from folks about what GPS models features you like the most.  Some of my requirements include:

• Screen - not just tracking
• Topographical Maps
• Mac Connectivity - Preferably bluetooth

Basic Usage for me:

• Plot waypoints before a hike
• Use During a hike to verify location/path
• Little geocaching
• Exporting hike details to Google Earth, etc..

So, what models do you prefer, and why?