Lots of opinions on this...
I have the 208 cam in my GN, also with Champion ported irons. It idles well and runs very well. In my experience it seems similar to the very popular 206 grind. I think the 208 would work extremely well in almost any street application.
Many Buick specialists will caution against camshafts over 210 or 212 for street cars, and I have a 218/214 in our T-Type. It's noticeably cammier than stock but I love it.
I'm not aware of any durability issues with the 208, and don't think you can go wrong with it.