The best partitioning schem for a 250GB Sata hard drive & a 75GB SCSI hard drive

Hi

I have 2 75GB SCSI hard drives and 2 250GB SATA hard drives which are using RAID Level 1 respectively. I wana have both FTP and Apache installed on them as services. I'm wondering what's the best partitioning schem? I wana use FC3 as my OS, so, I thought I can use the 75GB hard drive as the / partition and the 250GB hard drive as the /home partition, and for each user in the /home partition I can give FTP and HTTP (through public_html). What do you think? Is it a good approach?

At the same time I'm wondering how I can put a disk quota on every user home directory, like each user can only have 50MBs of space for example.

Some ppl suggested me to have another partition for /var, wuddya think? Is it necessary? If yes, why and how many giga bytes for that partition?

Thank you,
bijan