I use a Seduction. I've used Beyer mic transformers on 1:15 and I have some Sowter 1:10s now. Used a 103 for years, have an SPU now. Never had an Eros in my home system.
These carts require proper care & feeding. I'd say the arm influences more than the stepup... Sounds like it's been some time between attempts, what all has changed? Just the phono stage, or is there more to the story?