Jim Roumell has done it again. I reported back in January that the deep-value expert who heads Roumell Asset Management in Chevy Chase won the Wall Street Journal's "Investment Dartboard" competition, beating three other stock-picking pros. His victory promoted him to the next contest, which, as the Journal announced July 10, he won as well - with Horizon Offshore Inc., a Houston oil services company that rose 36 percent during a dismal half-year. Since the contest has been discontinued, I asked Roumell what stock he would select if he had a chance. He offered two: AVX Corp. (symbol: AVX), a maker of electronic components that has dropped by one-third in two months, and Quintiles Transnational (QTRN), which provides research and marketing services to drug companies and has tumbled 60 percent this year. Both are well-managed firms, says Roumell, with lots of cash. Two others that he believes could be "exceptional bargains" are Rational Software (RATL), maker of program-development tools, and Comverse Technology Inc. (CMVT), telecom equipment. If your own research on these four stocks proves fruitful, put them in the high-risk part of your portfolio.