Looking to spend $3000, on a home theater, help with equipment please??

I'm looking at a Samsung 61", entry/mid level Onkyo receiver, and a basic Polk Audio Speaker package. Room is 200 sq ft, and I will be sitting 7 - 11 ft from my TV. Need help on products, and additional items I will need.

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It looks like you've got a good start, I'm concerned about the size of the TV for that room though - how far will you be sitting from the TV?You're on the right path with DLP and Samsung, but if you're going to be closer than 12 - 14 ft. then the 61" is going to be too large. If you're over 15 ft. then the 61" will be good, but anything under I'd look around a 50", not only will it be better for viewing distance, but it will be better for your eyes, and also will give you a better picture. As far as the receiver and speakers go, both are a good value, but for just a little more you can get quite a bit more out of a high perofmance HTIB. Take a look at the Denon DHT487. Its $699, and comes with a full speaker package equivalent to the Polk, a better receiver, and an upconverting DVD player with HDMI. It is a 7.1 receiver, but the speaker package is 5.1 (no big deal, you can add more on later if you want). Its available at Circuit City and Best Buy.Plan to spend a few hundred dollars on cables, power conditioners, mounts or stands for speakers, universal remote, etc.If you have questions feel free to email me through my profile, or check out my blog below. I do Home Theater training for a living and teach people how to purchase and connect their Home Theater Systems as well.

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If you are 7 - 11 ft. away, then the 61" is entirely too big. I would look at a 50" max. It will be a more comfortable view and also give you a better picture. Imagine how uncomfortable it is to sit too close at a movie theater - then take that and imagine that everyday at home. That's what you'll feel with that 61".A power conditioner is a surge protector with fitration in it that protects against interference from electrical components, power lines, other electronic appliances in the house etc. This will make the products perform better, and last longer.As far as the connections go, that will vary based on your Source (satellite, cable, hd or not), which receiver you go to, whether you're going to run the speaker wire in wall, mount the speakers or put them on stands, plus an antenna for AM/FM and HD reception. Once you make your decisions on the product this would be easier to decide.

How can I add a powered subwoofer to my existing home theater if I already have a passive sub?

If your subwoofer is a passive sub then this will more than likely be an easy fix. Take a look at the system - most passive subwoofers are connected with the outputs from the front speakers (meaning that the speaker wire outputs for the front speakers are run into the subwoofer, and then from the subwoofer to the front speakers). If this is the case then you can easily put in a powered subwoofer the exact same way, but because it is powered you will have control over it through the subwoofer itself. However, if your receiver happens to have a Subwoofer pre-out then all you have to do is get a subwoofer cable and connect the subwoofer via that cable, and you will have a true powered subwoofer, and could even keep the existing subwoofer in place as well.