3.5 KVA power supply whether switching or conventional.
Auto tune amp that can be controlled from the front panel, computer, or exciter.
Solid state 1.8 - 50 MHz capable of 2.5KW CCS
Support for software defined radios, for example pulse step modulated IGBT based switching high voltage power supply (see http://www.j-hawkins.com/am.html), internal direct digital synthesis master oscillator (optional) and in-phase + quadrature modulation (I+Q) to support unlimited operating modes.
I would like a solid state legal limit amp, which is reasonably priced. What they are asking for some of these amps is atrocious, I paid less for my first car than for what they want for amplifiers now a days. Even tube amps, some of the prices are simply outrageous on tube amps. Make it on the KISS principle, somebody has to have a nice amp at even 1KW that doesn't cost a small fortune.
Use direct digital synthesis as is done in high end broadcast amps.