I prefer the ERJ-145 over the CRJs for the same reason as SEA_Tigger. Better overhead bins, 1-2 seating and better window placement.
I've sat in 1A and that was a great seat. I've also sat in 3C and that was fine, but 1A is better. Fortunately, one one flight the big guy next to me in 3B found a separate row to occupy on my flight. The seats were leather, but I don't recall having adjustable headrests also.