Tally one more vote for the Mach Lite. It's a great, portable basket that is life-size and catches quite well. Also very durable and easy to use. I've had mine for two years now, and although I've used it a bunch I can't see much wear to it. If you're looking for a basket that's more portable/convenient than metal, the Mach Lite is where it's at!
I have a InStep DG200 that was given to me. It s a good basket for the price. I have seen them as low as $80 online. I wouldn't want to play an entire course of them but for practicing in the back yard they are nice. If you have the money then a portable Mach 3 or what ever is the way to go.