Again, it depends what the emphasis is. For those with high blood pressure or high cholesterol, fish oil(salmon oil is probably the best one) is an important supplement. For others without those conditions, flaxseed oil is probably a better supplement. As for using both, that may also be reasonable. I noticed that flaxseed oil is also available mixed with fish oil and borage oil, or mixed with borage oil. This conflicts with my previous statement that taking borage oil with flaxseed oil doesn't make sense. I guess these are all practical options.

http://www.barleans.com/total_omega.asp
http://www.barleans.com/omegatwin.asp

I also noticed that one needs to choose the high lignin flaxseed oil if tthey are interested in lignans, as the lignans are filtered out from the normal oil. The flaxseed oil I have is not the high lignan variety. I guess the next bottle I buy will probably be the high lignan variety.