Personally I think that tyres are a very dubious area to cut corners on (no pun intended) . Whilst some people may not regularly enjoy spirited driving, we are all at the same risk of ending up in an emergergency stop situation, and that is the reason I won't use budget tyres any more - especially in UK which, let's face it, gets more than it's fair share of wet weather.
Just my 2p, sorry for thread hijack