your Mac has the CPU speed, RAM and available hard drive space...
The Canon HF series and Sony HDR-CX series are worth a look. Their AVCHD/MTS files are very different from the pro-grade HDV, DVCPRO HD, HDCAM, XDCAM and h.264 MOV files of the Sony HVR series, Panasonic P2HD series, Canon XH and XLH series, and JVC GY series camcorders. Most of these also require your Mac to have a firewire port for importing.
I'm looking to get a new camcorder. The camcorder must be full HD quality, a decent optical zoom, under $600, and must be compatible with a Mac- especially Final Cut Pro and iMovie. This HD camcorder will be a temp fix for my filming until I get a professional HD camcorder. Please let me know which brands/actual camcorders work for me listing pros and cons and where I could purchase them. Much appreciated. Thanks.