I say hit 500 mg/wk at least on the first cycle and get the most out of the first cycle.
i did deca/sust at 400/500 respectively, gained 40 lbs and kept 30 post cycle
after that, i started upping the dose of test by 200 mg/wk per subsequent cycle.
i don't beleive in doing 250 at first, you might gain big, you might not . .