Something like this:http://arcsdr.com/
with an external amplifier like this:http://www.tentec.com/model-418-160-6-meter-solid-state-linear-amplifier/
could be a good match to your stated requirements.
The K3/P3 doesn't operate in the manner you suggest.
Only a small part of the amateur market opts for "mouse control" equipment.
Most hams find there's an almost visceral connection between 'real knobs' and interacting with the 'ether.'
Some don't have that need, but, their numbers are fewer and so the availability of gear for them will be limited.