well i cancelled my GT2 CS Edition order, and instead ordered the Thrustmaster T500 RS which i should get tomorrow.
NB the T500 isn't yet patched for PC and will be soon, I hope sooner than later
. also i guess out your budget range.
The Fanatec is a reputed wheel, has some on the fly adjustments. too bad I couldn't actually get one, due to logistics fiasco there. that said If you do go Fanatec get the CSP pedals, but they are worth £200 alone. but tbh I wouldn't buy the Fanatec wheel with stock pedals, i'd rather go for the G27 then
The G27 is probably better bang for buck since you get pedals, wheel and shifter for about £200 (ligitech also does a trade in program where they knock off £50 for any old logitech product, even an old and cheap mouse) - also there are some mods to make the pedals much better like Nixim mod (under £10) or more radical Perfect Pedal (more like $200
) which is supposed to be even better than CSP load cells
I can't say from fist hand experience, but after research, i would conclude that the logitech steering wheel is quite capable on PC and can easlily modded for improvements. What makes the fanatec shine is the CSP (apparently nothing compares at that price range), the on-the-fly adjustability, and the look, but it will cost more (about €400 incl shipping without shifter).
One more important thing that I think is worth mentionning - is customer service. Logitech is good, Fanatec leaves a lot to be desired, esp for that kind of money tbh (they need to improve that, why i cancelled my order - it's not just the supply issue, but communication is poor and inconsistent and I would dread having to deal w/ aftersales - they're a very small company with limited staff, 6 from what i gather
http://www.corporateinformation.com/Company-Snapshot.aspx?cusip=C280ILB00)
in the end it depends how strechable your budget is. whichever you choose should be a notable upgrade from your current wheel
good luck and happy racing
PS I am no expert and don't claim to be, just my 2 cents to help you get started with some info
if not I guess g27 is best