Regular Guy,
I buy mine from Puritan's Pride.
The brand I buy is called 'Super Omega-3'. It comes in a 1000mg capsule, each containing 300mg EPA and 200mg DHA. I take 2/day... It costs $14.50 for 90 capsules. I wait until they have their 3-for-1 sale.
Another highly touted brand is ResQ-1250. It is a pharmaceutical grade of fish oil (very high in EPA and DHA - the critical ingredients you want to maximize) - but this brand is expensive.
You should aim for at least 1000 mg of EPA + DHA daily to realize a benefit.
Omega-3 Fish Oil helps raise HDL (as does Niacin), and helps reduce inflammation.
Regards,
HubbleRules