Should I use seperate switches for VOIP and Data?

Hi,
Would there be a benefit to using different switches for our VOIP phones and the rest of our network? We are a small business with 20 workstations and 20 phones. I am looking to upgrade our switch, and would prefer to order (1) 48 port Gig POE, but would consider two separate if makes a difference. I would rather not have to worry about VLAN’s or using the managed switch to separate things out.
Thanks in advance!