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In perfect seeing you can magnify things about 50x for every inch of apperature. In normal seeing about 30x. So in normal seeing your OTA will be able to magnify an object a maximum of 5 * 30 = 130 times. To do this you'd need a 1000mm / 130 = 7.6 mm eye piece.
Jupiter is about 30 arc seconds in diameter. At 130 x magnification (3900 arc seconds) that's about a 1 degree view - or twice the apparent diameter of the full moon.
To me that seems unachievable. Personally I think in great seeing - on an awesome mount, with top quality eye-pieces and great focusing you'd be able to get it to about half the size of the full moon.
To achieve rock steady seeing you'd need a great mount - as every jerk or bump is also magnified 130 times!
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