Upgrade MacPro Tower from OSX Lion to OSX Lion SERVER (Pros/Cons)

Question

I recently upgraded both of my Mac's to OSX 10.7 lion
First the stats on both my macs;
#1
12 Core MacPro Tower
x2 Stock 2.66 GHz Westmere Processors
12 GB Mem
120 GB SSD intel boot drive
x3, 2TB Samsung HD's in the other 3 slots
Running single user Mac OSX 10.7 lion, and one of thw Samsungs has a 500GB Windows 7 partition
#2
15" 2011 Macbook Pro
i5 Intel
8GB Memory
120 GB SSD
Running single user Mac OSX 10.7 lion
The home network it run by a 500GB Time Capsule (used to back up the laptops preferences only really, the tower has it's own 4 bay RAID unit that I use to back it up), the home network also supports two apple TV's which stream iTunes media from the tower. I of course use my laptop for when I am out in the field and away from home, whatever downloads or files I've created on it are transfered to the Tower and then deleted from the laptop for the most part.  Recently my grilfriend has moved in and wants to use the tower in the similar fashion that I do as she also has a mac (which I mostly maintain), and I want to create a system that makes it easier to share and transfer files remotely on our home network, which finally brings me to my question.  Would upgrading my tower to 10.7 Lion server edition allow for a more versatile set-up like this?  Would I still be able to use it as a stand alone desktop with all of the apps it has insalled in it?  Would it affect my media (iTunes) library and streaming to appleTV/airtunes or home sharing? What are the pros and cons of switching from a single user OS to the server OS?
Thank you in advanve for being patient with me, I'm relatively new to trying to be more than just an average computer user,
-Adam

Answer 1

I was just in a conversation on another list going on and on about syncing, calendar sharing, hassles with Mail, etc. I was explaining that today, even though there might only be one or two computer users on a LAN, each of those users may have several devices, so we're back to client/server architecture. But I didn't realize Lion Server was only $49 piddling bucks!
I'd do yerselft a favor and get it; I'm thinking of it. I've probably paid more over time for various applications and services that do what it does outta the box. Like calendar and contact sharing, email serving, etc. It does webdav too, which makes file sharing easier on mobile devices.
Otherwise it acts like any old Mac; I can't imagine her use would strain any of the resources you have. Much of the software the server uses is part of the regular OS anyway. Check out the features it has; it looks pretty good.
And give us a review if you get it.
Rob