The ICOM IC-705 should be considered in this thread as well. It meets your "Looking tor a rig that does HF as well as 2, 70, 6, 10 along with the regular HF stations. Had An eye opener today at field day. Would like waterfall capability, but it's not a deal breaker. Would like to fit in a backpack." description of what you are looking for. What do you give up with the 705? Output power. But running low power is possible IF you have a decent antenna (e.g. and EFHW) up high enough.
Regarding the EFHW balun: Sure! Lean out the window and put a screw eye in the window sill or side of the house. Hang the balun on that, run the other end out to a tree or pole.... and you're good to go.
Regarding the EFHW balun: Sure! Lean out the window and put a screw eye in the window sill or side of the house. Hang the balun on that, run the other end out to a tree or pole.... and you're good to go.