Given your location is USA, I would suggest Crew would be the better option. Their medical insurance is far better than Parc's and they understand the whole 401K stuff, which is different to the system offered by Parc. I am told they also have a good grip on the US tax system, so you can save yourself some time and effort on that front.
For Antipodeans and Europeans I would recommend Parc. In my opinion they seem to be a bit more organised and better run than Crew. Their medical insurance is still woefully lacking but it's probably less of a factor for the places I've mentioned than it would be in the USA.