With your budget and wanting best bang for the buck I would look for a set of Dynaudio, Audience 60 or 62 are a slim, low profile, 2-way floorstander, you would even be very pleased with the 52 which is a bookshelf. Dynaudio does great bass. Important would be what you plan to drive these speakers with. Revel just came out with the Performa 3 series and you could probably pick up a Performa 2 series at a deal, I actually prefer the 2 series.

For $800.00 you should consider used speakers by brands like Wharfedale or Golden Ear. There are a lot of options out there.