Welcome to the forum, euro95. I have used a 1050 in a similar size room to drive
Paradigm Reference speakers very successfully. The setup is great for music, and there are a couple of DSP modes that can work pretty well with cable TV watching (and on digital channels you have the option of Dolby Digital decoding, of course). I can't speak specifically to driving the JBL's you use, but would not anticipate any problem.
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Gonk