Help s2 noob - Galaxy S II Q&A, Help & Troubleshooting

I recently acquired my very own shiny new sgs2 (bout week n alf ago) i have managed to root it which was pretty easy i have to say. But now im stuck, ive come from an xperia x10 where pretty much every rom wud work with any build or version, to this phone where there seems to be individual roms for different builds and versions, and dont know what is safe for me.to use.
My phone is:
Kernel: xwkf3
Build number: GINGERBREAD.xwkf3
CSC: O2U
Which roms will i be able to use from this forum. Or even better is there a thread already in existence that can talk me through wat is safe to use or how to work out for myself which are safe (i have searched a lot and cant seem to find info i need)
I desperately want to start to unlock the potential of this phone but have kno idea where to start.
Thanks for any advice you can give this poor sgs2 noob
Sent from my GT-I9100 using XDA App

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sscdougal said:
where pretty much every rom wud work with any build or version,
Same
to this phone where there seems to be individual roms for different builds and versions,
Not true
Which roms will i be able to use from this forum.
Any you are currently on KF3
You need to start reading the basics and understand them before flashing .A week spent doing that will be rewarded .
Any firmware any modem any kernel any CSC is the basics .
http://forum.xda-developers.com/forumdisplay.php?f=1058
FAQ
http://forum.xda-developers.com/showthread.php?t=1065995
Guide
http://forum.xda-developers.com/showthread.php?t=1125282
Kernel codes etc .
http://forum.xda-developers.com/showthread.php?t=1194973&highlight=kernel+list
better battery stats .
http://forum.xda-developers.com/showthread.php?t=1179809
Applications safe to remove .
http://forum.xda-developers.com/showthread.php?t=1069924
Rom Kernel Modem list
http://forum.xda-developers.com/showthread.php?t=1253665
jjue
Click to expand...
Click to collapse

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so ive done a little reading from your suggested list and from what i can make out i should be ok upgrading to:
XWKI4
Firmware info
PDA:XWKI4
PHONE: XXKI1
Date: 14/09/2011
Android 2.3.4
OXX MultiCSC(AUT, COS, CYO, DNF, EUR, NEE, ODK, ORG, ORS, PAN, SEB, SUN, TDC, TMS, TPH, TRG, VDH, VOM, XEE, XEH, XEO, XEZ, XSK):http://www.multiupload.com/BICMMUFFWF
ATO (Austria): http://www.multiupload.com/6R69F500FQ
DBT (Germany): http://www.multiupload.com/YS0ZU2PAEV
XEU (UK): http://www.multiupload.com/GQXU786O28
MSR (Serbia): http://www.multiupload.com/033W4Z0L5P
CPW (UK): http://www.multiupload.com/QROGHPRZVK
TPH (Portugal): http://www.multiupload.com/9NVGY9MF4D
XWKI4 Stock Kernel: http://www.multiupload.com/ORHRRNA60I
Password: [email protected]
the xx being for my area and flash firmware marked XEU for UK. am i right????
also im guessing that the first files are the stock firmware and that i also need to flash the stock kernal that goes with it??? and will this wipe my phone (planning on doing full nandroid backup first along with either titanium or backup root, backup just wanted to know)
sorry if this all been asked before but as i said ive come from Xperia x10 where things where a lot more straight forward

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Yes or 2.3.5
XEU is UK
Kernal is in the stock firmware its not separate .
The big difference in the roms is the CSC and that just gives local network setup details .
Personal choice as of now would be start by flashing stock KH3 rom
from intratechs stock rom thread .
XXKH3
Android 2.3.4
This package has: PDA: XXKH3| Modem/phone: XXKH3| CSC: OXAKH3.
Download: http://www.multiupload.com/P92D3CE95I
Follow that by Root and CWM
http://forum.xda-developers.com/showthread.php?t=1103399
Use
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CF-Root-SGS2_XW_XEU_KH4-v4.1-CWM4.zip -
Once phone is setup a custom rom such as Cognition 1.51 is simply flashed via the CWM recovery from sd card .
http://forum.xda-developers.com/showthread.php?t=1124396
USB jig will get rid of yellow warning triangle and custom rom counter .
jje