Doctor Aziz, it all depends on what media you're going to use. If you're aiming at higher speeds with good quality then yes Liggy & Dee's V2 Beta 6 firmware would be a good choice, stock is good but not as good as a modified firmware.
Here's a list of good firmwares:
Quikee's Version 2 Milestone Release
Quikee's Version 3 Beta 3
Liggy & Dee Version 2 Beta 6