Alternator upgrades anyone??

Has anyone upgraded to a high amp alternator? Im only running a few things and you can see lights dimming under heavy draw. i upgraded to an Optima red top which made a noticeable difference but its still not enough. I have light bar on the way. i dont wanna just slap on a big alternator and fry anything... any info would be appreciated.

I would get in touch with Ohio Generator and have them custom make you a H.O. Alty .. had that done for my old Avalanche and their pricing wasn't bad at all ..

Here is what I've found, though I am not at home it makes it difficult, but this is what I researched.
 
http://hiperformanceexc.com/alt2.aspx
http://www.alternatorparts.com/
http://www.wranglernw.com/default.aspx

hm-did you replace the factory alternator wire and power/ground wire when you added the red top?  upgrading that will make a difference.  i have experience with the wrangler products as well-they are good.  one easy option is to check with your local generator/alternator shop.  we have one nearby and they have rebuilt some customers alternators in the past with huge systems to increase the amperage-thats a nice option since you know your alternator will bolt right up without brackets or mods. 

Thanks for the info. I am gonna get one made from Ohio Gen. and also have the wiring upgraded by them they seem to have GM pretty well covered...  now Im thinkin about upgrading everything to HID . might as well.  I appreciate the info From all.

Great info for powering large audio systems....keep up the good posts