mrk - you gotta try the PA ROM on that gigantic screen.
Wanam has me institutionalised

Too early to tell, I'll be more sure this time tomorrow
Okay so to update on this, first full day at work with the N2 and given the same kind of usage as I used to give the S3 running Wanamlite as well.
Verdict?
Awesome!
The battery life is much better, I unplug the phone around 7AM when the alarm goes and normally by the time I'd get home at 4:30PM I'd have between 30 and 50% battery left (maybe less if screen on time was higher) as I like to listen to music, surf, whatsapp and email on the way to/from work but on the N2, even with the bigger screen I'm sitting here right now (as of 18:55) with:
I use auto brightness and at work have WiFi switched off. One big thing I noticed was that even in places at work where the S3 struggled to load the web as signal strength peaked -90dBm, the Note 2 has no trouble even at -107
The audio quality was a surprise as well, I use PowerAMP and the bass on the Note II is a little lower than the S3 but the treble and spaciousness of the sound is more clear, there's more warmth in the sound playing through the Vsonic GR07 IEMs, it's less 'closed room' than the S3 is.
The built in speaker is WAY louder and clearer than the S3, I played the latest Star Trek movie trailer and I properly enjoyed the big screen and big sound.
One handed operation? It's not as easy to use one handed as the S3 of course as it's quite slippery, once the case arrives I'll decide further on this as the S3 was slippery one handed as well but I had little issue using the phone one handed on the walk home listening to music.
Portability vs the S3... It is a bit thicker than the S3 but it fits in my top pocket without a huge problem, feels at home even.
What I like about it most compared to the S3 is how it's faster at doing everything, the camera loads faster, apps switch faster and there's over 700MB of RAM free whereas the S3 was always reaching within 100MB of the limit.
The screen is amazing, simply put! I haven't actually made proper use of the stylus properly yet, I need to download stylus enabled apps to play with as well but the responsiveness of it is near instant and I'm liking it a lot.
Here are a few comparisons to the Galaxy S3 showing audio quality of the speaker vs the S3:
If anyone wants me to compare anything else against the S3 then I'll be happy to do whatever
Edit*
As of now (20:55) the screen on time is 3hrs 16mins, uptime is 12hrs 15mins. I've been doing the tests above at 100% brightness so that took some off but at this rate I can see 6 hours screen on time and 24 hours battery life
I have noticed one bug and maybe it's Wanamlite ROM but if you turn off autobrightness then the screen won't autorotate even if autorotate is enabled. Bit weird but I use auto brightness anyway. Speaking of this, autobrightness is better on the NOte II than on the S3, it's less jumpy and more pleasing, more battery friendly too.
Plus mrk will miss his samsung stuff like the camera, motion features and most importantly, the grandpa calendar!
You dis my calendar usage!!