Well, Having had the benefit of bixenon lights on my most recent two car purchases prior to the Panda, of course the Panda's halogen lights are neither as bright, nor do they provide as even coverage across the lit path. That said, Compared to the late-model Nissan Almera I owned prior to those vehicles (and the last I owned with halogen lights), I find the 'throw'/reach of the lights is actually pretty good and way better than said Almera (which I had into the garage numerous times to have the lamp alignment checked). Night time driving on unlit dual carriageways at 70mph in the Almera felt like an act of faith! (Akin to Bogwoppit's VRS and Aussiepanda's MG, by the sounds of it!)
Having said this, I have found that the lamps have great reach on setting '0' whilst dipped, but switching to main beam leaves a duller patch mid way along the lit area (let's refer to this as the 'rabbit-zone'!). On main beam, I find setting to '-1' gives a better compromise in reach and evenness of coverage. Then one evening, I switched on the front, low-mounted driving lamps and found that, on setting '0', they helped fill the gap in main-beam coverage - result! Not sure if the slightly higher ride height of the 4x4 is responsible for the way the lamps behave on main beam? (Different angle of incidence to the Tarmac at a given distance in front of the car?)