The only issue that I have found with having these frequencies.... you cannot use SSB on 10m or 6m (or any band... nor can you transmit in AM). This radio is good for REPEATERS on 10m,6m,2m and 70cm, but not standard QSOs.... so even though it opens up for "HF" portions of the bands, you cannot really use the HF capabilities like SSB or AM or whatever. I bought a Diamond V2000a antenna because it had 6m capabilities, yet found out it really didnt work how I wanted it to.
I think if I were to go for it again, I would just buy two of the 7800s and be done with it. However it is always to have something and not use it rather than to need it and not have it. Maybe check around to see if you have any repeaters that are 6m or 10m and go from there?
Just my $0.02.