alternator suggestions?

[dhamilton62]

Hey there, just wondering if anyone had any recommendations for a decent alternator? I have a new gm crate 350, I'm not running too many accessories like a stereo or a heater, but I do have dual electric fans. I just bought a new optima red top battery, but at idle the volts seem really low until it revs up past 1000. Also the dash lights want to dim at idle or slow speed moving in traffic and what not so I think the alternator might need to be replaced and with one that can handle more electrical components. Any advice would be much appreciated!