Our database size will grow as a normal Oracle Governmental Financials implementation does throughout the course of several fiscal seasons. Currently the database is less than 15Gb, but with the additional modules (we are adding) will increase the size.

My concern about NT is not in DML performance, but yet the realiability of the database server staying up without a reboot. Much of what I have read indicates that there is a lot of server bouncing when you migrate to NT. With solaris, we never bounce the server and it is very stable.