OK if you are talking less than 2k, I would honestly say go with an integrated amp instead of a pre/power combo unless you intend to upgrade in the near future. Also, if you go with an integrated amp now and make sure it has a preamp output, you could always then upgrade. Im not saying that you cant find a nice combo but Id imagine your money being better spent with an integrated-- 2k in the audio world wont even get you 'hi-fi' (i.e. they will call it 'budget' audio- which is ridiculous and done, primarily I think, to guilt middle aged men with penis complexes into spending upwards of 20-100k on a sound system).
Unfortunately, your room dimensions suck auditorially- especially the ceiling. Of course you could cut your losses by positioning your primary listening space closer to the speakers- but even then you have to worry about reflection. Look for articles like this:
http://www.mhsoft.nl/SpeakerPlacing.asp or
http://www.soundfountain.com/amb/speaker.html which can help you get your thinking about it straight- honestly, Id say most people can get more out of a system by placing your speakers and listening area correctly.
OK so Id imagine you are also asking about product here. Unforunately, most people end up buying whatever their nearest audio dealer has to offer. This isnt the best route because companies differ in terms of their aural philosophies- i.e British vs. American sound. Usually most people prefer certain companies to others. Try to listen to as many setups as possible- my bias, given your price range, is to pick a good reliable integrated amp and then audition speakers using that amp. The NAD C320BEE might be acceptable to you (I enjoy mine and NAD is notorious for underrating their apps, the 320 is rated at 50 watts per channel- I dont remember why this was the case (essentially the wattage they stop at depends on a very conservative threshold for distortion) or you might want to spend more here and less on speakers- for around this price, check NAD, Rotel, Cambridge Audio, Creek, Arcam, Marantz, etc.. the usual culprits that make good affordable budget hi-fi. Amps are a good place to buy used, they arent really abused- I used to buy my stuff from
http://www.audioclassics.com/ when I was living in NY. Im not sure how their mail order is.
Personally, Im of the opinion that speakers are where you can get the best value (price/performance) (others say that since your sound system is essentially a chain- it will be as good as the weakest link).
I dont know much about newer speakers, but check out Tannoys, B&Ws, Whafedales maybe, KEFs, (Polks.. I dont like them but some people do)... check out forums like audioasylum.com for gearheads that know a lot more than I do, but take it all with a grain of salt- there are some very strong opinions which often defy reality