My friend has the EMS one and it is beautiful to look at and it sounds nice as well. The carmac is beautful and sounds wonderful. The rivanna is a beautful harp and I am after the 34 string as my Harp tutor said it is really good for the price.
I would buy the EMS one as you will own that and it is a nice Harp.
I would also go for the Ravenna – I haven’t played the Triplett but prefer Dusty Strings to Camac generally and I personally would feel to limited with just 22 strings – even a few extra make a difference.