dmk11, you need to make up your own mind.
Head down to a store, and play with an 8120.
If it suits your needs, and you're happy with its features, then go ahead and buy it.
If your 8100 suits your needs and you don't need the added features of the 8120... then keep your 8100.
Only you can make this choice. You can read all the reviews you want, and get all of the input from other people that you can stomach... but in the end, the decision is yours.
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