Hey guys, from reading round the forum the idea of saving a few quid and fitting my own tyres is begging to appeal to me, what would I be letting myself in for? I tend to fit more aggressive tread wheels like tkc's and k60's. Would it be worth balancing? Any special kit needed? Does the money saving out weigh the aggro?

Reason I ask is my local shops are a little funny about fitting tyres they don't supply but online prices are getting so competitive now.