Getting a new corporate production machine.. Need best Unix flavor and hardware.. Advise pls!!

Our production server right now is an IBM R6000 with Unix AIX 4.3.3. Currently it runs a call center of about 30 people connected to it via dummy terminals and also hosts 2 heavy hitter websites. The call center uses a software program that uses files as it's database. For the web I'm using Virtualhosts on APache of course. The problem is that the AIX is so freaking old (8 years old) and is starting to act funny and won't integrate with new technologies. The dang thing won't even compile new installations properly and won't take any new versions of GCC. It's just a pain. Things to note is that it is a file server, so a bunch of Windows workstations connect to it bia samba. Also everyone always telnets into the Unix box to access the software. What's the best Unix for something like this?? I always hear about RedHat for the corporate world, but it seems like overkill, I certainly don't want a resource hog like GUIs and unneccessary programs. Just need a stripped down powerful Unix OS. So to summarize, my main needs are:

1.) File server
2.) Web server
3.) Application server

Any suggestions are greatly appreciated. Thanks in advance for all the help.
bemara57Asked:
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TintinConnect With a Mentor Commented:
None of the Linux distributions require a GUI to run/manage, so you could certainly go down the Linux path. (I'm assuming you're after something free/cheap?)

Another good alternative is Solaris.
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pncorpConnect With a Mentor Commented:
I was just on AIX 4.3.3 and we ordered a new IBM Pseries with AIX 5.3 and it works great for us.
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biraConnect With a Mentor Commented:
I migrated from risc AIX 4.3.3 to Intel linux SuSe 9 and had no problems. that is free and works very well
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mr_egyptianConnect With a Mentor Commented:

FreeBSD
http://www.freebsd.org

In some areas FreeBSD may seem to be a bit behind many linux distros in areas suc as hot off the presses hardware suppert et al, but if you're in a production environment where your primary concerns are stability and security this would be my choice.  If you HAVE to run linux binaries, you can and the documentation/community is great.   OpenBSD is arguably more secure 'out of the box', so for a firewall/ids it may be a better choice.

And the ports collection rocks.
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mr_egyptianCommented:
Sorry about the spelling. It's late.
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chris_calabreseConnect With a Mentor Commented:
I'd say the answer depends more than anything else on the call-center software you have already. Is it in-house developed or third party? If third party, what other OS platforms does it support? If in-house, is there anyone who knows it well enough to move it over to another OS platform?

AIX 5.x on p-Series is a good choice if you need to stick with AIX.

Linux on Intel could also be a good choice especially if you want to stick with getting support from IBM (they do have excellent hardware support).

Solaris is a good choice if you have a lot of existing Solaris expertise.
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