Gunter, your question is an important one so do not feel bad. If you could only have one router it should be a plunge router. The ability to plunge into the wood makes it simple to create signs, make mortises for strong joints, and many other tasks. Height adjustments are usually much quicker, and anything you can do to reduce set up time means more time spent routing. (getting the job done)
Combo kits are an inexpensive way to leave an accurate set up in a router table and still be able to free hand rout. I suggest you do some online shopping and I am sure you will find better pricing. The popular and inexpensive Craftsman combo kit is one way to get routing for the minimum layout of cash. Bit sets seem like a great idea but most routing is done with about 10 bits. Buy better quality bits in sizes you will use instead of getting 50 bits of low quality that will gather dust.
"Living in the D" (this means Detroit!)
"It's fine to disagree with other members as long as you respect their opinions"