If you don't want to go HID, then I found that PHILIPS EXTREME H4 60/55 were twice as bright as the 130/90's I had in, despite drawing a lot less current, and look VERY similar to HID on dip, with masses of light.
On my other car(astra mk3) I also rewired slightly so that dip stays on even on main beam, makes a massive difference for a bit of wire.
tabetha