You should join and research in the ft817 yahoo group.  
(NOT to be confused with the ft-817 group.)
READ THE FAQ!

Also, check out www.w4rt.com 

A CW filter is a must.  You may want to consider the dual filter from
w4rt.  The w4rt is the only one giving you both a narrow ssb and
narrow cw filter.

Do a google search on w3ff and buddipole for both commercial and
homebrew versions of this portable multi-band dipole.

DON'T buy an ATX antenna.  Probably better off to avoid the maldol
whips as well.  The miracle whip sucks.  If buying a commercial dummy
load, check out the superantennas MP-1.  Any of the HF antennas will
need a good counterpoise.  Elevating the wire is better too.

Consider a 7aH gell cell and some fused power-pole leads for when want
to work more than an hour or so.

If you want a linear check out the Tokyo Hy-Power HL50 80M-6M.
Order from the factory, they'll adjust for 5w drive, 50-60W out.

For auto-tuner consider LDG Z11.
For manual tuner ZM-2 or other.

FT-817 Commander is good free software for programming/control/digital modes.

Drop me a line with any questions.

73,


Bryan - k0emt
http://www.dbbear.com/k0emt/