Help With RAID Configuration

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I've got 4 identical 1 TB drives and would like to use them in a
software RAID configuration on my home server. I'm running Debian
Linux using 'mdadm' utility to manage the software RAID. I don't know
how much I've read is fact or dated or even false so I decided I would
ask here to get help from people who know more about this than I do.
This is essentially just a file server machine to store all my data so
being that I've got four identical SATA hard drives, I was thinking
about doing RAID level 5. I guess I'll start here and ask if that is
the recommended level of RAID. I think RAID level 5 will be fine for
my general server usage. My second issue is partitioning the four
individual drives to get maximum performance / space from them.
Basically just asking here how would you or you recommend I partition
the drives? I was thinking about doing three seperate partitions per
drive:

/dev/sda1 = 4 GB (swap)
/dev/sda2 = 1 GB (/boot)
/dev/sda3 = 995 GB (/)

Now from that partition schema above, obviously all the types will be
'fd' for RAID and the partition for /boot is going to be bootable. My
confusion is that I read Grub doesn't support booting from RAID 5
since Grub can't handle disk assembly. If /dev/sdx2 (sda2, sdb2, sdc2,
sdd2) are partitioned for /boot (bootable), how would you guys
configure this RAID to match up equally? I don't think I do a RAID
level 1 on 4 identical partitions, right? Can anyone please help and
tell me how I should configure these 4 identical drives to work on my
system? How would you set this up?
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