If you don't want the headache of building- the DX Shop in the UK has a great line of VHF/UHF amps. I picked up the Gemini 23, its a 210 watt 1296 amp but I would keep it at around 150 watts. You can have Roger banks configure for 110 or 230. Fair price, great piece of gear. With FX from the UK probably around $1500 to your door.