CWM recovery and Rom manager don't work well with the rezound, not sure exactly why but I know from experience you will get boot loops if you use it to flash roms.
Scotty could enlighten further, but generally all u need for a 'full' nandroid backup are /system, /data, and optionally, /cache and recovery.
I have never come across a time I needed .android_secure , and my sdcard is too full to store a backup of itself so I use my PC to do that.
Checking the box that says compress backup with amon ra creates a backup that can't be restored unless you manually uncompress it, in my experience. Go figure.
Technically speaking, nandroid backups use the same underlying data format as.clockworkmod backups. The only difference is that clockworkmod backups are stored in /sdcard/clockworkmod/backup .
I just moved a nandroid backup into a /sdcard/clockworkmod/backup folder and used the 'Extract from CWM backup' feature in Titanium Backup, and it worked.
I know amon ra isn't touch, per se, but give it a chance and you will learn to love its power.
You can use the 'back' button with amon ra, just fyi.
PS make sure you use amon ra 3.15 or later.
PPS I think I read team win recovery works ok on resound if u absolutely can't stand amon ra.