Question : Suggested Redundancy

Hi Guys
Need suggestions. Setting up a small hosting site for two clients ( 50 users). Running on Three Hp DL380 G5's  
Server 1 PDC and WIN 2008,  Exchange 2007 ,
Server 2 and WIN 2008,  MSSQL 2008,
Server 3 Terminal Services .
Have the power protection covered. (UPS 1 .7 hr @ 70% & Generator)
Hard drive configurations
Server1 & server 2
                         System Drive mirrored 146GB,
                         Data Drive Raid 5 =3 * 15k x146GB
Server 3           1* Raid 5 3* 15k 72gb

This site will be active 24 hours. Needs a lot of Hands on maintenance all hours of the day with specialist software hence the reason I am hosting.  

But disaster recovery/Backups just cannot make up my mind which is the best way to jump.

What would you guys do... replicate SQL to another server?, Tape backup the rest , Symantec Net-backup with BMR .  

Looking for a solution, that has high reliability, does not require large downtime for maintenance and will also allow for growth.

Thanks in advance for your help

Answer : Suggested Redundancy

One of the first things i deploy as part of a layered redundancy is VSS *Volume Shadow Service" (or copy). You can set this up on every server, as its a built in service in windows. You can VSS your production partition to a "spare" or less active partition.

VSS takes a snapshot initially (which can be scheduled by you), then snapshots the changes from then on. This opens up the "previous version" tab on files and folders, allowing you to restore them, or an entire volume from a set point in time.

This can be used as part of your redundancy solution, along with a solid tape drive running an app like Backup Exec as ecsrd mentioned.

Have  a peek at this to see what i mean
http://technet.microsoft.com/en-us/library/cc785914.aspx

cheers