This is the bassinet on wheels that a previous client had and loved. She put diaper items and nipple cream and snacks in the bottom so everything was there when she needed it (it also goes until 5 months). She had a nursery but ended up sleeping with the babe beside her for the first few months. The American Academy of Pediatrics (who is not hippy-dippy at all) suggested room-sharing for the first 6 months to reduce the risk of SIDS (sudden infant death syndrome) unless you have a night doula or nanny there to be in another room with the babe. It also fits snugly against the bed. I believe the mattress pad is wool and natural latex so they don't have fire retardants and other chemicals. If I would spend money on anything it would be mattresses. I think it is important to get comfortable mattresses that are low in toxicity for sleep. This site gives a run-down on mattress safety. If you want more information on some of the research, Barry Richardson in Australia has done extensive research on the topic and you can read more in an article here.
This is also one that seems popular and safe for sleep and on wheels. I have also had clients who swore by the Rock n' play sleeper especially if they have reflux and get fussy if they are laying flat. This one does not meet any "non-toxic" sleeping standards, but would be used more for naps during the day, not extended sleep.
This is a sound machine that friend got us, and it is simple but works. It seems like a simple more affordable one, but you can always try a few out and return them :)