Just thought you might appreciate my input here as I also deliberated over the 15" and 17" models for some time.
At work and at home I use a 24" screen (1920x1080 resolution on both), I think I would struggle to go back to a lower resolution so initially my decision was going to boil down to portability of 15" (which I could then connect to monitor) vs all-in-one of 17". I eventually decided that 17" for me, was the correct option as I wanted to move away from the desk otherwise I would have just got an iMac!
In reality, the 17" is no less portable than my old Samsung X20 15". Apart from being slightly larger in dimension my MBP is possibly even lighter, and it's just as thin! Moving around the house is not a problem. One thing to consider into your price is a good bag for transporting/commuting. I have yet to invest in a proper bag, but it is high on my priorities.
I would also recommend the anti-glare option; moving about a lot means varied levels of lighting and the matte screen performs admirably in high-glare scenarios,