This winter I have baught a new sailplane model, first time in years... Helios was really a good choice. Amazing to see how are made those new DLG, and flying is superb !
Modern 2.4GHz radioset also now goes with downlink as a basis, that is you can have altimeter & variometer reading on the screen, and sound into an earplug !
More info on Helios : http://www.compositegliders.com/
Also play the game "spot the difference".
I have indeed baught the Butterfly "dream vario". It is very well built, installation of the sensor box requires some care... I will hopefully see in flight how this piece of technology is robust, and actually bring something to my flight technic !
I just hope I won't miss too much the 303 interface for simple but efficient navigation...