I highly recommend the Grob, I’m a big fan since they released the FSX model. I don’t use the Tutor/glass pit model, I much prefer the Heron with it’s ‘steam gauge’ panel and that quirky little GPS it uses (without a map display). Lots of fun in my grass-stripping adventures.
No, no ADF unfortunately, but that is what visual and de’d reckoning is for! 
I won’t buy the PC-21, though. I much prefer the PC-9, which I thought they were going to release.