What's your document management story? If you're drafting/keeping track of versions in Google Docs,[1] then you should opt for a cloud-based solution that can integrate. Clio, RocketMatter, and MyCase are the big ones. They run $50/$70 per month per seat. Clio integrates with DropBox too. HoudiniESQ looks neat. Also has Google Docs integration. Self-hosted or cloud hosted. Pricing is pretty reasonable $1280 for ten licenses up front, then $192 per user per year.

[1] If they don't have a DMS story, they need one!