I have a iq2000 and love it! I used it for the first time down in Lake Powell on a crappy house boat in July, running it 5 - 8 hours a day. I haven't used the Honda, but can vouch for this being a very quiet unit for a generator. What I can say is that having an electronic gas guage...
The faithful 80 took me 3 hours from home (and deep into the middle-of-nowhere) to meet-up with various family members for the opening day of duck-hunting season here in Utah:
Mcmaster makes a uhmw strip for t-slotted rails ... A little pricier but made to fit this type of application: http://www.mcmaster.com/#47065t5/=z24sk2