Hi. I'm having problems choosing the right speakers for listening to music and I'm hoping to find an answer here.

First of all, I'm pretty new in the hifi-world and still have a lot to learn. Oh, and I don't speak English at home, so I can make some stupid mistakes now and then .

Situation:
Last year I wanted something better than ordinary pc-speakers and I ended up buying a Marantz SR5500 receiver and a JBL SCS178 5.1 set. I'm happy with them (games and movies sound great), but I don't like the satellite-subwoofer combination very much for music. They are connected to the digital out on my pc, with Soundstorm (DDL encoding).

I would like to buy 2 new front speakers, either bookshelves or floorstanders. Because it has to play in combination with my old set, I came up with JBL's Northridge series. My choice first fell on the JBL Northridge E50, but the price of the JBL Northridge E60 is more or less the same.

Since I live in diggs, my room isn't the most spacious out there and I know that they both are overkill for it. But the plan is to keep them for years and move them later in a HT room.

Is there a big difference between the bookshelf and the floorstander model? The drivers are the same, so is the price. What would you suggest to combine with my "old" set? The main purpose for them is playing music.

Thanks.