For my case. I love the 30x100 superlink size as well, I'm currently staying in a duplex in PJ. So I will not consider to move for anything less than a 24x80 landed terrace house.
Currently my wife and kids work and study in PJ area. So travelling time for them is only 10~20mins now. If we move to DA or Elmina without DASH, travelling time will increase by at least 40mins per trip, so around 2 hours per day. And there are no suitable schools in DA or Elmina now.
I estimate DASH will take at least 4~5 years from now to complete (Elevated highways takes longer), so maybe around 2019 (provided they manage to start it next year).
Currently the superlink or corner house in DA or Elmina are at 1.1~1.3mil range, if I buy now, I have to pay bank loan interest and leave it vacant for 3~5 years since rental yield for this property cannot even cover bank interest.
So for people who worries about house price will continue to increase, this is what I do. I will use the budget to invest in good rental yield condo in PJ, 2 or 3 condos at price range 300~500k, equivalent to a superlink house price in Elmina. If property price continues to go up, most likely these condo price will go up as well since fundamentally they are much stronger (with good rental yield and low vacancy rate). When DASH highway completes, and the travelling time becomes shorter, I will sell all the investment condos and buy superlink in DA or Elmina.
Well everyone have different life style in different stages of life. When I see DA now, the township gives me the same feeling I had 10 years ago when I visited Bukit Jelutong. I fell in love and bought my first house there (currently rented out). I was still single then, so no problem with the travelling when NKVE was not so jam yet, I can get to PJ within 15~20mins. After I got married and have kids, we have to think about kid's school, babysitting, and time has become a precious element now.
i am not sure what kind of school your kids study but the is a chinese school and international school in near elmina