I've always been against the idea of docking stations, but I guess it depends on how often you use your laptop at a desk. 99% of the time* my laptop is on my lap, and even when I'm at a desk, I don't see the benefit of one, especially one that is not shaped to fit the laptop.
I just looked up the item you are talking about -- unless I'm mistaken, it's a glorified USB hub + monitor ports. Do you plan on using the laptop with a monitor a lot? Even then I just don't see this being that useful. USB hubs generally go for $20-30 range (albeit not as pretty as the Toshiba dock), that would be my recommendation based on my guess.
Also one more thing, is there a difference between A505-S6005 and A505-S6004? Amazon has the latter for $666.85 and I see the former listed at $629.99 on BestBuy.com. Asuming 5% tax, that's comparable prices... I'm just always trying to convince people from giving money to Best Buy
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* I take that back -- when I use my laptop at work (it's my main computer at home and at work), it sits on my desk, on top of the case it came in. Every morning I connect (1) USB hub, (2) monitor dongle, (3) headphones, and (4) power -- I imagine I would save maybe 30 seconds if I had a docking station that had those four items already connected... but I just can't justify a $100 purchase for something like this, even when I use my laptop at a desk 50% of the time