Actually, there isn't a lot of choices, stock wise, for the 590's. I don't know anyone who actually shoot with rounds in the stock. I've had these on many guns (590's and 870's) and have never had any issues with them. I find them very comfortable to shoot..... but that's just me.
500/590 take the same stock so there is quite a few stock options for the 590A1. I have 3 different ones being shipped to me right now to experiment with and I have a wood & OEM stock right now.
It's good to know that if I buy a model with the speedfeed that someone will buy it.