Still not enough. You mention 150+ databases, adding 1GB new data daily. How much space is needed for the existing databases, how much extra disk space do you need based on the growth? When do you need to add storage space or upgrade the SAN, NAS, etc.

Do you want rack servers or are you going to use blade servers?

It still comes down to "It Depends."

What are your business requirements, SLA's, data storage, not just databases but backups, and how many? Are you going to use/need backup deduplication (that alone could add 180,000 to your price tag by the way).