Questions about upgrading OS/flashing my phone

[Voxonas]

Hello! I'm considering upgrading my OS on my hTC Vox, but I wondering about a few things:
- Do any of these WM 6.1 versions support Scandinavian language/letters (Æ, Ø, Å)?
- How is the performance vs. the original WM 6.0 version?
- What about the battery time? Increasing or decreasing?
- Is the different versions stable, or is someone full of bugs?
- How much free memory in the different versions?
- Can I easily change back to my original official ROM?
- uSPL is for all devices, not only for operatorlocked devices, and it's necessary to get the unofficial ROM's to work?

Anyone who has experience with some of the versions?
Which would you recommend?

The versions I'm talking about:
Dr. Martin Gonzo's Wm 6.1 'Mona Lisa" v1.0 SYS 19593 XIP 20262

* download from http://forum.xda-developers.com/showthread.php?t=419995

Dr. Martin Gonzo's WM6.1 ROM

* download from http://forum.xda-developers.com/showthread.php?t=376564

96dpi ROM by zeeshee (WM 6.1) (new v4)

* download from this thread

NEO ROM for Vox By fireburned

* download from http://forum.xda-developers.com/showthread.php?t=401587

WM6.1 CLEAN ROM for Vox By fireburned

* download from http://forum.xda-developers.com/showthread.php?t=414416

Vox ROM WM6.1 96dpi

* look in this thread for the latest update

Lite ROM v1.1 + 2.0 Update by frauhottelmann (WM 6.1)

* download from http://forum.xda-developers.com/showpost.php?p=2129066&postcount=1

EDIT:
Do this language pack work with all the different versions? Just download to the phone, and install?
http://forum.xda-developers.com/showthread.php?t=384186

EDIT2:
Added two more questions.

[kabeza]

Very nice question
I was going to ask the same
Hope everyone can share their experiences flashing their phones with the different roms.

I can't wait to flash my Vox... I'm tired of the fabric's rom :D

[Vener]

- Do any of these WM 6.1 versions support Scandinavian language/letters (Æ, Ø, Å)?
By default, no, you will need to install the fonts.
- How is the performance vs. the original WM 6.0 version?
6.1 is faster than the original, especially in some parts like file exploring but overall, it is snappier
- What about the battery time? Increasing or decreasing?
Decrease, but depending on how you use it, it may seem shorter, but enough for one day's use.
- Is the different versions stable, or is someone full of bugs?
There is some bugs in some features but i guess you won't be needing it anyway.The only prominent bug SD encryption doesn't work.
- How much free memory in the different versions?
no idea
- Can I easily change back to my original official ROM?
Yes, it is easier than flashing custom roms, just execute the flasher from your carrier or htc then follow the instructions
- uSPL is for all devices, not only for operatorlocked devices, and it's necessary to get the unofficial ROM's to work?
uSPL is for VOX ONLY. It unlocks the cid not sim lock. Every device will need it to flash a custom rom.

[kabeza]

Hi Vener
Did you try the roms pointed by Voxonas?
Which one would you recommend?

- What about the battery time? Increasing or decreasing?
Decrease, but depending on how you use it, it may seem shorter, but enough for one day's use.

I don't think it would be nice to upgrade to a rom that makes battery duration to decrease... unless it has a kicking awesome incredible new feature :(