I've been looking at big turbos too but it won't be for another year at least. I'm rebuilding my engine at the moment with Wossner pistons and ZRP rods.
Banks id go for the GTX3071R for the extra money, better all round turbo and faster spool.
I can see from both points of view with big turbos on FWD cars, but like others have said you learn to drive it and when your rolling and want to pass someone you'd be past them before they even know it. Years ago they said 200bhp in the civic Tyre R was the maximum for FWD, look at the focus RS from the factory over 100bhp more than that. My brother was saying the car will never handle with over 300bhp through the front wheels and was very surprised when he drove it and even complimented it and that's something if you knew my brother. He's a jap and rear wheel drive kinda bloke............