Jim Worden says he and his firm "really, really like" Nvidia (NVDA) and notes Broadcom (AVGO) as a rising competitor in the A.I. hardware space. When it comes to other mega caps, he's not as confident. He sees Apple (AAPL) and Amazon (AMZN) struggling with tariffs and sees road bumps ahead for Tesla (TSLA). Lisa Schreiber doesn't expect Amazon to face as much tariff impact as Apple. One headwind she sees in the company is its AWS cloud revenue.