Suggest some good name brands for bicycles.

[Elgin Clock]

I'm looking into getting a bicycle for the summer for some exercise and recreation purposes.

Right now I'm torn between buying a road bike, and mountain bike.

Normally I would get a mountain bike, but the trail I would be riding on mostly would be paved unless I wanted to go back to my roots, and ride trails I used to ride when I was in HS.
Which I may just do.

Anyways, give me some good suggestions as to some name brand in terms of both road bikes, and mountain bikes.

The only requirement I have now, is that it is has multiple speeds (I'm not looking for a cruiser bike with a saddle seat ) and that it has a quick detach front wheel so I can fit it in the back seat of my Neon.

Oh, and I'm not going pro any time soon, so I don't need a 5 lb bike like a friend of mine had in HS. No Bianchi for me thank you very much. lol

Max price range I had in mind to the extreme range would be 200-250 bucks if it was well worth it. More like 100, but a bike of more quality grade than a Walmart/K-Mart/Sears bike would be nice.