Hi,
I would like to know if there is any chance to support opensuse/SLES or at least give the chance to install it?....

Thanks.

I'd take another route and see if they'll let you send a pre-formatted harddrive to them to put in your box(es).

PS: What was your bad experience with RHEL?

A more workable solution is to send us the installation CDs and then set up a KVM on your server...

Ah, good idea.

Or have Professional Services do the install...

Bad expirience with RHEL?. No serious filesystems support is one and right now my serious concern.
Centos has no reliability and bad availability.
no good security tools (selinux is unusable with tools like cpanel) no good firewalls tools in the distro.. and many more!!!

Thanks for the replys. Is good to know that i've the chance to change the distro.

In case of problems, is there any professional support for suse/opensuse ??

Be advised that if Suse were installed, your SLA and support scope may be significantly altered or reduced.

Which filesystem are you needing that RHEL/CentOS doesn't support? I've yet to see any significant lack of various filesystems commonly used in a dedicated hosting environment.