I'd go with a mei tai over a SSC. I have a BH and love it; it's really comfy and easy to use. I don't have an Ergo but I have a Rose & Rebellion which is the same kind of idea. I do love the R&R too but the BH is my first choice usually and it can be used from birth without an insert.
ETA - it's superficial I know but I prefer the look of mei tais too. They look kind of arty/a bit hippy, whereas SSCs can look quite like Baby Bjorns and I get BB parents looking at me like "oooh we're in the same club" but we're NOT! Yeah I'm a carrier snob. If only wraps didn't make me too hot!
I LOVE the mei tai more every day : I just popped it on so I could get on with housework, and Robin watched everything I did fascinated, and got to meet the kitties - and has now fallen asleep just in time for me to have my breakfast!
Any opinions, advice, statements or other information expressed or made available on BabyandBump.Momtastic.com by users or third parties, including but not limited to bloggers, are solely those of the respective user or other third party. They do not reflect the opinions of BabyandBump.Momtastic.com and they have not been reviewed by a physician, psychologist or parenting expert or any member of the BabyandBump.Momtastic.com staff for accuracy, balance or objectivity. Content and other information presented on BabyandBump.Momtastic.com are not a substitute for professional medical or mental health advice, counseling, diagnosis, or treatment. Never delay or disregard seeking professional medical or mental health advice from your physician or other qualified health provider because of something you have read on BabyandBump.Momtastic.com. BabyandBump.Momtastic.com does not endorse any opinion, advice, statement, product, service or treatment made available on the website. If you think you have a medical emergency, call your doctor or emergency services immediately.