You might want to take a look at the Yaesu FT-857-D, like the IC-706 MK-2 they are a bit pricey , but you can vary the power through the menu system (I don't know if the 706 will allow this or not) .
Given what you've asked for , the 857 seems to fit the requirments and then some, you'll pay a price for one but they seem to be a fairly rugged little radio if treated right.