Oh yeah... Anything fairly new (ie 2002 Land Rover) should be good enough to handle the load. Also, anything with a good size alternator (ie 2002 Land Rover) will be able to handle it.

Only when you try stuffing a dozen amplifiers into a Ford Escort do you need to worry about power handling. BUt an amp or two in this guy's ride won't have any problems.

All statements above are assuming that things are hooked up "correctly" though... To me, that means running an 8 or 4 gage wire from the battery back to the amps, a proper power distribution block, and a good size fuse right at the battery for that wire itself. Ground wires should also be of decent size, and grounded to the nearest convenient chunk of metal with a star washer underneath for good contact.

But yeah, the battery and alternator will be fine, I'm positive of it.