Thank you all for your support and responses... I hope this reply encompasses nearly everyone!

If I do try FF, it will be a gradual process - last time DH tried to feed DD EMB from a bottle she refused the bottle, so it looks like she's become a real booby baby! It may take some work to interest her in a bottle even before putting the supposedly yukky smelling HA formula in it. During the 'trial period' I'll definately keep my supply going in case it doesn't work out (or I find that FF is more of a hassle than the diet).

I guess part of why I'm finding the decision so hard is that I'm open minded each way and can see the pros and cons of both. There's still almost 2 weeks until DD is 6 mths old but will keep you posted on how it goes.