If you're going straight into a computer go with a usb one. An XLR mic required phantom power to give it any kind of gain.
The downside of the USB mics is they're more than likely a total heap for crap.
Personally I'd go for a decent XLR mic, Shure Mics are totally reliable solid mics with excellent clarity, anything £50+ is pretty good really.
Then you'll need to get a USB/Firewire audio interface with phantom power. I've got a TerraTec Phase X24fw firewire interface and it really it the dogs danglies.
The downside of the USB mics is they're more than likely a total heap for crap.
Personally I'd go for a decent XLR mic, Shure Mics are totally reliable solid mics with excellent clarity, anything £50+ is pretty good really.
Then you'll need to get a USB/Firewire audio interface with phantom power. I've got a TerraTec Phase X24fw firewire interface and it really it the dogs danglies.