Post-MBA decision

Trying to make an important career decision. Would love to hear others thoughts. Thanks for reading. 

Background: just finished MBA (M7). Need to decide between opportunity at my old firm or a consulting offer.

Old firm: Public investing (stocks, funds, fixed income etc.). 

PROS: Great WLB, comp is good $260TC (upside is likely capped around $350, lots of political capital, ability to drive strategy, job security. CONS: we serve a niche client market that has not been growing and will likely consolidate further in the future. Very small firm nobody knows much about. Means nothing to recruiters. Could be in a bad spot in 5-10 years if industry slows further and would need to reset my career. 

New firm: Tier 2 focused on CDD/growth strategy. 

PROS: brand name, prestige, good pay(though slightly below old job), learn new skills, open opportunities down the line I don’t have access to today. 

CONS: WLB would get killed, hearing lots of negatives around quiet layoffs, inherent stress with the job.

I didn’t go to a prestigious undergrad and have found it difficult to push higher into the top jobs (IB, consulting etc). I feel I may be wasting the MBA I just got if I don’t capture that now. However, I don’t know if consulting is all it’s cracked up to be. I don’t see being in it for the long haul (partner level) due to starting a family etc. and am wondering if it is stupid to do consulting just to exit to industry in 2-3 years at a comp I could already have at the old firm? Or maybe I’m not thinking about the long term here and consulting could open other doors to MM PE, strategy/Corp dev, startups that would give me really interesting work and $ upside. 

Thanks for any insights!