i've used the d60 and it is nice but it feels like a little toy in your hand, even the rebel series feels more solid and more like a camera. I would really encourage you to get an EOS 30D or a 40D it will keep you interested and motivated alot more than a cheaper consumer DLSR,
I'm not a propoent of spending tons of money on equpment but the more money you spend, the happier you will be, the rebel series gets updated every year or so, the prosumer series get updated less often but they are higher in quality and technology and the professional series (1d/1ds) get updated even less often but when they get released they are so advanced not to mention they are factory tested to almost a third of a million shots