I've been using the large orbital buffers for over 20 years. If you buy a good one it should serve you well. Mine is from Sears, a 10" bonnet, weighs a ton, and is perfect for the occassional detailer and/or car nut. The big orbitals do a fine job of applying waxes and polishes. Use with a terry or microfiber bonnet.
The big orbitals don't turn enough RPM to generate heat and thus are quite safe to use. No special talent required.
Top brands are Chamberlain, Waxmaster, and Gem (who I think actually invented the orbital buffer).
What many enthusiasts use, incl many here, are the higher speed orbtials, especially the Porter Cable 7424. This uses a smaller pad, 5" or 6". The pads can easily be changed to tailor your needs for the kind of work being done. The PC has adjustable speed up to 6000RPM and has a strong motor so it can be used more effectively than a big orbital to remove scratches, oxidized paint, modest paint damage, etc. They are also terrific at applying and removing various products.
CMA sells a complete kit that includes the PC polisher and various pads. See it here:
http://www.properautocare.com/porcabuldetm.html
For a selection of other types of buffers, check these out:
http://www.nealsharbor.com/buffers.html
http://waxdepot.safeshopper.com/86/cat86.htm
http://www.gem-industries.com/
Hope all this helps. Happy buffer shopping.
