With the fanatec you have to use the clutch pedal. I simply have to press A and leave my left foot free for the brake. Since the clutch is purely digital you are going to hamper your lap times with a clutch pedal. Yes the 360 wheel feels cheap but I have no problem posting top 100 times with it while still having £400 in my pocket

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Where did you read or get the thought that You "Have To" use the clutch with a Turbo S wheel.
Thats incorrect as the "Clutch" wasnt supported on the E3 build, not that T10 said this but I know for a fact it wasnt and Im not even certain it was at Gamescon either.
Also many buyers of "Turbo S" will to cut costs use the wheel with their "x360 Pedals" and as you know they have no clutch.
It is my understanding the "Clutch" on the Turbo S will be Analogue and not digital. Again only on the Turbo S wheel. This will allow players perhaps more control of the revs, maybe drifters will make good use of it with "rev spiking" However this wont require the "Clubsport Pedals" but also be usable on "Standard Fanatec Pedals" and would also apply to anyone using the Turbo S with the "G25 Pedals" which it will work with.
Lastly what are you talking about at £400?
Buy the "Pure Edition" use it with G25 or X360 pedals you may already own. and its under £190. Still not cheap but its not expensive neither for what your getting and considering how much use it may get, mine will certainly be good value. Some guys spend that on a motherboard/hard-drive/video card etc so I have no problems spending it on a controller that gives me the best wheel on the market and only one that means I dont have to keep switching wheels over.
A much improved quality wheel wont necessarily make a player/driver vastly better. It does however make a game much more interacting, more responsive, much more enjoyable and possibly for some a small advantage to their ability.
Regards cost a G25 at £130 is great value but factor in the price of a 2nd wheel for X360 and well then the Turbo S begins to look not that expensive at all.