First of all, judging from the pictures he's got atleast a 2.5~3 inch gap between his tire and his fender, so 2 inches will be perfectly fine. The handling wont necessarily be shit either. The only way it will be shit is if you do exactly what Ricochet said, and just lower without replacing shocks.. that's why his handling was shit. Usually any car lowered more that 1.5 inches over stock requires aftermarket shocks otherwise your OEM shocks will blow out after 2 or so months because you're riding on shocks with improper shock travel. THAT's where you get the shitty handling from. Lowering a car 2" on OEM struts isn't going to make the struts themselves bottom out either, most likely Ricochet was hitting bump stops, and that problem can be solved easily by cutting them.
I would personally suggest that you go ahead and get those springs you were looking at, and find some suitable shocks you can use with that application, preferrably adjustable ones so you can adjust the dampening yourself if you want a softer or stiffer ride.
The camber plates are another thing though.. you could do without them and rock the camber which I doubt there will noticably be any, but just know that this will cause premature tire wear. Camber doesn't exactly reduce the contact patch but you will notice a difference in turn-in handling and you should have better overall handling compared to stock. The biggest problem of premature balding comes from improper toe which can cause massive amounts of scrubbing. You shouldn't notice extreme tire wear from a small amount of camber.
I highly doubt the setup your getting will be too mild for street seeing as how most "lowering springs" aren't normally on the extremely stiff side and are usually progressive rates which means the more they are compressed the stiffer they get. I drive my car quite a bit on the road and i'm running a very stiff setup which is circuit ready and it's bearable. Right now i've got my car lowered pretty close to 3 inches over stock with 8kg/mm(450lb)front coilovers and 6kg/mm(350lb)rear race springs and i've actually had to convert my car over to short stroke shocks to get proper shock travel, and invest in Roll Center Adjusters that way I dont have a large side affect of Bumpsteer. I run around -3 degrees of camber up front and i've been driving on the same tires for about a year and a half now and they're still nowhere near bald.