I'm one piece away from having a full set of D3 Classy's and I'm already enjoying the set more than the original version. It has even come in handy for PvP (in a team), which you could never say about the 1.5 version. Using MarcoStyle's build for the most part with some old Damage Resilience mods for the shield. Not sure if they still scale as well as they used to, but my shield rarely goes down, so I'm not complaining.
If you find your time to kill is a bit high you can replace the Damage Resilience mods for Ballistic Shield Damage Mods they max out at 4% so an extra 16% damage is a great trade off.