First system

Hello,
I hope to get some advice on my new system.  I want something to listen to music and watch tv/movies.  I have a listening room that is 15x20x12, but also is connected to my kitchen and dinning room.  Due to constraints I have to put my speakers on a bookshelf with limited space behind them.  I was initially thinking that the LS50 would be the best option for my price range, even though they are not front ported (I really haven't seen any stellar front port reviews!).  I also know that my ears aren't what they used to be, and I can't even hear above 13Khz, so part of me things this all is in vain.  

I was thinking of a sprout 100 to drive it.  My question is, 1 Does this system make sense?  I can't see why I would put more money into a dac/amp than around this amount based upon money spent on these speakers.  Would I really need more than 100W?  It seems that besides a subwoofer, this system isn't likely to get much better without putting more like 4K into it.   

Thoughts/Ideas?