You might look at a few of Dr. Greenthumbs strains. He has some nice throwback strains.
Bubba Kush is a nice throwback. Original Katsu cut.
The #4 cut of Chem is nice
C99 is the original Bros. Grimm one
ECSD is great
UK Cheese (real Exodus) is nice. (I like the pheno's you can dig out of Kaliman's a bit better)
OG kush, the original Ghost Cut - While a newer developed strain. This is the one I go to! Nice pheno's, even for it being S1's.
Panama Red has just been reviewed by a member here. I have to try it now.
www.drgreenthumb.com