Advice is required for DB transfers over £30k only. However, you can transfer even if the advice is against it, they just need to have provided advice. It's a bit of a racket really, I think that may change.
It's not a no brainer when you are in the situation, even with the good offer OP has. You would be taking the risk instead of the provider. As the rest of your stash is likely at risk from similar markets, keeping the DB and spreading the risk for a smaller, virtually guaranteed inflation proof return is attractive.
I got an offer recently of 38x salary which I did not take, but that's mainly because my employer still pays into it, so base amount still increasing. When I'm nearer the receipt date I'll think again, but offer may have changed by then as all depends on gilt yields (apparently)!
Sent from my Moto G (4) using Tapatalk