Mosschops, you sound like a pretty sensible sort of person to me, do what YOU want and know will work best for you! I B'fed both my DSs but went onto formula pretty quickly, within 2 months, and while I quite enjoyed b/fing while it lasted(although DS2 was harder than DS1) what I didn't enjoy was the constant pressure, overt and otherwise, from the hospital and other 'well-meaning' friends, that I would be somehow 'failing' my baby if I didn't! I am a pretty bolshy type of person so can stand my own ground, but on the night that DS2 was born, I remember sitting in the postnatal ward's 'quiet' room at about 2am, desperately trying to get this new baby to feed, and looking up at the walls which were totally plastered (and I'm not exaggerating) with breastfeeding propaganda! I felt pretty bad about the fact that DS2 didn't seem to want to feed from me as easily as DS1 had, but if I had been a young, frightened first time mum, possible on my own, I would have felt TERRIBLE surrounded by all that - a total failure!
I had a freind who tried for 3 months to b/f and got clinically depressed because she saw herself as a 'failure'. It was only when she got DD onto formula that she started to recover herself.
All I am trying to say is, you know the facts, make an informed choice and don't let anyone make you feel less of a good mother for it. Not everyone wants to b/f; not everyone CAN. You will be the perfect mother for your child whatever you do!