I was introduced a couple of days ago to the L@ttice SerDes devices
They looked all right. They have this thing called "pre-emphasis" which could be easily modified in the SerDes and was improving the eye-diagram a lot (with some side effects like an increase in the power consumed...).
They have serial data rates from 0.6 to 3.7 Gbit/s.
I have not experience with SerDes to be honest but just in case this helps,