Okey, here my experiment from the last post above...
I go back to OpenWRT Attitude Adjustment r33288 after i found this Repos http://scottn.us/downloads/openwrt-r33288/ar71xx/ for r33288
Using this with my FLashdisk Transcend 32GB, it's stabil if just downloading below 10 file torent... ( it's just i active download, and the rest is in queue)
But if this more 10 file torrent, i still make my router reboot.... 
on 13 november, My Harddisk WD MyBook Essential 3TB USB 3.0 arrive...
After that, i do some SMART test, the format it with 128MB for Swap and the rest Ext4...
Put it on My MR3220 and i type "firstboot", reconfigure it and i do Whole Exroot to my WD MyBook Essential,
It's Running Perfect now, i have test it for more than 1 day 23 hour...
torrent download, perfect, with more than 10 file to download, it's still runing without reboot...
and MiniDLNA, wow.... it's runing smooth, without "MEDIAPLAY" Error in My Samsung TV anymore...
Playing Anime for 6 six hour, i dont get MEDIAPLAY error... before... with r33288, Eko.one.pl Backfire and Barrier Breaker r34122 i still have MEDIAPLAY error... soemtimes after 30 menitus, or 1 hour....
I have test playing music with my Samsung TV too, it last for more than 6-12 hours....
About TPLink N600 and N750, after my experiment above...
I not gonna buy it....
i watch it with top, i learn, what i need is, more RAM and i think 64MB is enough...
of course more cpu power is needed, but only the first time i run MiniDLNA, it will use all my cpu power to scan my movie, music and pictures that i share with MiniDLNA...
Even with my PC Athlon II X2 260 with 4GB DDR2 RAM, when i run MiniDLNA and Share my 500GB Anime , 20GB Music and Pictures, it will make my PC lagging because scan proses by MiniDLNA.
When MiniDLNA and Transmission runing, it's need more RAM, mostly for Transmission.
Perhaps if, i have more time and not busy, i will try to change the RAM to 64MB...
Now about Raspberry Pi, i like the Model B , it's have onboard LAN, 2 USB, 512MB RAM, 700Mhz CPU power...
But... in my country.... the price is arround 50 dollar to 65 dollar...
And the TPLink N600 is arround 65 dollar too...
So, for me, TPLink N600 is more attractive... it have WLAN, 4 Gigabit ethernet and 1 WAN Gigabit...
and 560 MHz cpu power + 128MB RAM is enough for me... (after saw the reslut of my experiment above)
About DLINK NAS, i have saw your thread in here https://forum.openwrt.org/viewtopic.php?id=38193
In my country, there is only D-Link ShareCenter DNS-320 with price arround 90 dollar to 100dollar
perhaps... i will try to get NAS, but after i googling, i found out, that TPLink make NAS to...
It's TPlink TL-NS210 , but the product not out yet, so i will wait for this...
I like TPLink, it's cheap and reliable...
Here screenshot of my MR3220 and some info:
My TPLink Router 3G MR3220 + TPLink ADSL Modem + WD MyBook Essential 3TB USB 3.0


LuCi Web Interface:



This my torrent file, it's have 1 movie with 4,65GB and 12 anime series, each series arround 500gb.

SSH info:


Edit 21 Nov 2012:
===========
Here more screenshot:
My MiniDLNA Web Info, i share about 300GB+ Anime, and the rest it's pictures and mp3 anime music:

Today i add more torrent file, it's 36 file torrent, and i show cpu and memory usage with top

Here AllShare Photo:










ps: sory for my bad english.
and if the image preview doesn't show up, just click it... it will show the full image.
(Last edited by sukanime on 21 Nov 2012, 13:07)