Is there a good company that i can replace my stock headlights (05 xterra se) with sum brighter bulbs or do i have to replace the housign and connectors

i have been searching the internet and found a few things but was wondering if i have to cut sum wires or is it an easy thing to do..i work at a volvo dealership and have plenty of mechanics than cna help me but was jsut wondering

all you need to do is get the right bulb for the housing and it will fit the wires... go with piaa's or silverstar or somthing like that.....and to whoever told you you need to cut the wires, you need to keep them away from your ride!!!!!!