If you're concerned about trying raw untested updates, then I highly recommend you try the CSSU Stable version. CSSU brings many bug fixes, a replacement Camera UI (research this though), and portrait mode, amongst other updates. Considering how you're starting from a freshly flashed device (btw make sure you flash both the eMMC and the kernel - it's all in your link), I don't think there's any real harm in trying CSSU. I fully endorse Mike's advice to install and use Backupmenu - it's probably THE most important piece of software you can install on it.

Have a read through the following thread for a discussion on the issue:
talk.maemo.org/showthread.php?t=81522