I too was leery about a BAHA implant after going through AN surgery, but rest assured the two are COMPLETELY different.
My AN surgery was 7 1/2 hours, 6 nights in the hospital, general anesthesia, weeks of recovery, etc.
My BAHA implant surgery was roughly 90 minutes (much of it spent draping me and prepping the site), outpatient, and I was wide awake (my doc used local anesthesia - lidocaine to be exact). I walked out of the hospital after about 10 minutes in the recovery room and went about my day. Healing was fast, without issues, and I was able to wear my processor 90 days later. My "Gotcha Day" was one of the best of my life; after being SSD for 9 months.
Most docs will do the implant with general anesthesia if you want; mine gives patients the choice, but over 90% of his patients choose local. It's nice not to have that "coming out of anesthesia" feeling, and with the local you don't feel a thing.
The BAHA isn't for everyone, but don't let the thought of another surgery turn you off.
My suggestion is try the demo and then make up your mind. The demo is incredible and the real thing is that much better.
As for the TransEar, I've heard really great things about it. I didn't go with one because I didn't want anything in my ear or anything that was noticeable to others (call me vain). Fit is key though, so make sure you go to someone who is well-versed in the TransEar.
Best,
Jan