Biochemistry and GMOs

I am very keen on buying organic food as I have a monosodium glutamate intolerance and so it is the only way to ensure flavour enhancer free food, and it does tend to be better quality. I also approve of the (generally) better conditions the animals are kept in.
I am a biochemist myself and have worked with GMOs. I agree that more research needs to be done before companies/governments etc rush into using the products, but I think people should consider that some of the genes that are swapped are ones that you would be eating anyway in other organisms or you contain naturally yourself, so why is there a problem putting it in another one? However, I don't agree with swapping genes between species, jellyfish genes belong in jellyfish. Using natural evolutionary techniques, such as selective breeding is fine as it is progressive and there is time to "weed out" problematic changes, but genetic engineering tends to be instant with no time to do anything if something is going to go wrong, hence the need for extreme caution.
And don't shoot the biochemist! Not all of us are paid by companies to get the results they want, most of us are honestly just investigating what's actually there! :-)