I beg to disagree!!!!
My Orion with MVVS setup is great, no, not a hotliner, but more than enough for what I use it.
...have you flown in/near Rio? I was there last week and boy, I wish I had taken a sloper (can you fly anything off pao de azucar?) or a thermal glider, lots of vultures and other birds thermalling all over the place