What is your end career goal?
How much PIC total do you have? I personally would wait until you have 1k. Going over as an SIC can limit your potential for openings in the future.
Can you move to a Cape air base that does the ATR and what is the upgrade time there? Cape air is leaps and bounds beyond QoL at any regional. Heard nothing but great things about them; It is one of the best kept secrets in aviation.