Lost&confused,
I have a room close to your dimensions (19x12). I went the route you're going first. Visual Apex package, receiver, I had a pretty nice speaker package already (M&K, a tad over priced but still nice) that I had put together over the years and then I bought seats, slapped them in the room and really enjoyed it for about 6 weeks. Then I realized that I didn't want a media room. I never did. I wanted a home theater. I gutted the room and completely re did everything. Now I'm happy. Very happy.
My question to you is, do you want a theater? Because this thread on AVS is full of guys that have unhealthy obsessions with building theaters. If you want a media room, and you think you will be happy with that for years to come, and you think that $6,000 invested into that room is going to provide you with the experience you want, then by all means, Visual Apex, a Denon receiver and a HSU speaker package is perfect. And I mean that. If you don't feel that you will be victim of this bug that the rest of us caught, then you already have everything you need. Unfortunately, asking advice in here is no different than taking a V6 Mustang to some gear head at a speed shop. He's just gonna tell you to go get a V8. However, if you have the slightest doubt that you'll want more in the future, I'm gonna suggest, from personal experience, to follow the advice from these guys and
1) design your room first i.e., lighting, seating distance, colors, columns or no columns, etc. etc. I designed my room with no stage, no soffit and no columns. I just wanted a clean look and I didn't want to spend money on all that lumber and crown and all that.
2) buy an AT screen.
I'll recommend HSU speakers as well if you wanna stick to a tight budget. Great bang for your buck.
Your budget may get stretched and it may take much longer doing it this way, but there have been many a nice room built little by little over the course of several years due to budget constraints. Hell Tom Logan pioneered the practice.