Wipac is a make, what are you looking at specifically? And are you after dipped or mainbeam performance?
Good halogens should be more than good enough tbh (unless you need an eye test
). Several options you can go down, such as higher wattage bulbs or some of the over 100% brighter options. In the Land Rover you can also run the headlights via an aftermarket harness direct from the alternator via a relay. The advantage here is, you'll get higher voltage at the bulb (and thus more output) than you will going via the stock wiring that runs through the switch (as there is a fair bit of resistance and you end up with lower voltage at the plug).
There are several makes of lenses, traditional ones have the glass cut for the beam, although newer ones use plain glass with a shaped reflector. I suspect the latter may have a slight performance edge, but probably not a lot in it. Wipac are generally well know and well regarded.
Other options are to run LED bulbs in the standard halogen housing. It's a little bit of a grey area on how legal it is, but higher wattage bulbs also aren't strictly legal either. In practice you may be able to get much better illumination and much better beam pattern and cutoff over the halogen bulbs. But the LED bulbs are hit & miss and you really need to do your research and know what you are buying. Far too much crap available.
Or you can run HIDs, although H4 HIDs are pricey. Although sadly like the LEDs there is far too much crap on the market. You want 4300k HIDs, pretty much anything else it utter garbage and should be avoided. Trouble is, even a lot of the claimed 4300k kits are also rubbish.
Lastly you can look at full LED headlamps. Some are good, some less so. Personally I've been reasonably unimpressed with the majority I've seen and a lot do seem to dazzle on coming traffic. Prices can be horrific for these too.
Personally if you are driving with mainbeam I'd seriously reconsider running some spot lights and/or a light bar. They make HUGE difference.