When my daughter was an infant she slept between her dad and I, not necessary to buy anything. She usually slept snuggled up right against me. Easy for breastfeeding and I actually slept (when I wasn't looking at her: ) Very little crying for her, very little waking on my part. I was still tired, probably from hormones and keeping 1/2 an eye open, and I slept with her in my bed while she napped.
My choice about this is a little different... I didn't transition her to a crib and she still sleeps with me at three. She naps in her twin and sleeps with me at night. I love attachment parenting (see Dr. Sears) and it felt right for my daughter and her temperament. Not right for all kids and families! See how it goes for you and go day by day, if you can, right now. You and your little one will change quickly and what feels right now, may not next week so be careful with purchases. Go with what feels right to you!!!
Jen