I owned a 718 for a while. Nice radio!
My power supply is a no-name, older, 20 amp supply that I bought from a guy at the local hamfest for $20. He said that he found it sitting next to the curb of his neighbor's house! It hasn't failed me in over 3 years!! It pays to shop the flea market areas at hamfests!!
I have an MFJ-993 auto-tuner. I just didn't want to have to hunt down the correct settings using a bunch of dials. It's only a 300W tuner, but since I run barefoot from an IC-706, it's not a problem.
Antennas.....that's like asking which beach is your favorite! I don't have a great HF antenna here in this apartment, but if you start browsing www.dxzone.com
, you'll find TONS of antenna ideas and plans from across the world that you can experiment with. That way, you can find out what will work best for you at your QTH.
Have fun!! 73!!