I wonder if the 230 will ever be replaced. I personally have tried all the OHR implementations of Garmin and non of the work for me so I honestly don't want to pay for a feature I don't use. I currently have OHR completely turned off on my 235 but I wish I could buy a FR240 with a better screen and more accurate GPS.
That's all I need and none of the pointless VO2max, steps, OHR and other semi-working features ...