[Soekris] net5501 - some questions

[Richard Homonnai]

Hello!

I am really eager of buying a net5501, as I am really happy with my net4801 
but a bit more power would just be very neat.

So I hope I can find help in here.

I am right now using my net4801 for the following tasks:
* Firewall/NAT Router via IPtables
* Mail Server (Exim/Courier IMAP)
* Web Server (Apache 2.0.x)
* Database Server (MySQL 5.0)
On the web server there are most notably running Cacti and eGroupware.
Horde is also installed, but plainly not used because eGroupware overruled it.
* Print Server (CUPS)

I am using a quite normal Gentoo Installation, and am very happy with it.

So now the question is, will the net5501 be much faster than the net4801 under 
these circumstances? Do I really need it?

And which one do I need? I would really be ready to buy the highest, but so 
far I only found the -70 model.

Also I am using a Harddisk, the CF card is there for backup to not wear it 
out. But I cannot find any HDD Kit for the net5501...

So, if anybody can help me, it would really be nice.

Greetings, Richard