MILAN (AP) - Gentlemen, things are going to get serious next fall and winter. It could be the crisis gloom, but many Milan designers are thinking business. Double-breasted suits are a favorite in preview shows that continued Sunday for a second day. As are flat leather bags, good for computers, or even newspapers. Shoes are classics, oxford lace-ups, loafers, fringed moccasins or ankle boots, often with silver accents. A bit of bling? Suits are tailored, and colors are dark and sober, with luxury expressed mostly through the materials - alpaca, cashmere and tweeds. There is little sportswear in this round of Milan menswear with the overcoat making an elegant comeback. Scarves are also making a strong showing - a layer of security, not only against the bitter winter nights but also the financial chill.