I still carry an old Skymap 2, usually living in the emergency bag with an EPIRB and an Icom radio.
Recently I was seriously tempted to buy the wonderful Avmap EKP IV - IMHO the best VFR/IFR handheld GPS currently out. (Navbox has just added route download support for it too)
But, as far as I can tell, it uses the same Jepp base data as all handhelds on the market, which means that Class A airways are not shown, other than just centrelines.
So I will keep the Skymap for emergencies, and will stick to my tablet computer running various GPS map applications, including Memory Map which can show the exact copy of the CAA chart.