My Oregon 600 setup:

Firmware: 3.50
System Text Language: English
internal memory: Basemap + City Navigator
SD: Topo Netherlands Pro + Topo Belux Pro
Activated: Basemap + City Navigator
Profile: Automotive
Activity: Hiking

Where To? > Addresses > Spell Country > Netherlands > Spell City/Postal Code > Utrecht (shows Utrecht, Utrecht) > Staalstraat > Enter House Number and finally hit Go.