I have bf two kids and I must say I love my electric pump. I was lucky enough to be able to take to bf stright away (apart from the first week with DD1, when I expressed in hospital and the midwives cup fed her until a lovely midwife came and helped at every feed for a day and we cracked it
With my pump (I beleive it is called a first years breastflow, it was the cheapest electric one on the mothercare website) I can decide I want to go somewhere, spend 10 minutes or so pumping and get two feeds worth, giving me an average of about 6 hours until I need to feed her again, although I do try to have more in the freezer in case she has a mad feeding day. I just use the cheap normal bottles that they sell everywhere, as I tried posh ones with DD1 and she rejected them. To me, being able to pump has been a major factor in helping me BF as sometimes I just need a couple of hours break. With DD1 I used it so I could go out gallanvanting, this time I seem to be using the time to get housework done or have a bath.
My recommendation would be to buy a 3 pack of cheap bottles and a steriliser as you will use them with any method of feeding, and get a cheap hand pump to try it, or borrow an electric one from a breastfeeding group or wherever. Don't buy any formula as you can get hold of that easily if need be and it will be too tempting otherwise. Also make sure people around you (ie DP and anyone who might babysit, but also MIL and so on) understand that you really want to bf and that they should not give the baby formula lightly.
Bf is the best thing, don't beat yourself up if it doesn't work out, but it is well worth giving it a good try if only for laziness purposes It may well be hard to start with, so get loads of support and keep reminding yourself that it does get easier. If you can get through the first bit, things are brill.
What has really helped me is the "forth trimester" idea, that the first three months of the baby's life are basically like being pregnant with the baby on the outside, you will be tired, you will still be out of shape, but the baby is easier to look after on the outside than inside and hopefully you will get little breaks When they are running about and you are worrying about them eating mud all this will be a distant memory.
When I am exhausted, sat on the settee on mn with DP bringing me brews and a baby attached to my boob, I just think how much more tired I would be if I had to make up a bottle for each of the endless feeds.