Hi,


I am no pro but just my individual inputs


Many have created pictorial wonders with the kit lenses you have. As you shoot for memory i tend to think as below:


70-200 f/4 L will help you gain a lot in terms of image quality provided you have stable hands as you are planning to buy a non IS version. L series lenses have solid build quality and come with good weather sealing. Also, if you wait for sometime the prices may fall down as newer lenses with latest IS technology implementation are being released. Be ready to get bitten by the L bug; these glasses are pro grade & very tempting.


70-300 IS USM will help you increase your reach and with IS you wont have to bother much about blurry images. In case you dont have very stable hands and want sharp imagesgo for this one you will enjoy it equally. Also saves you some money; with which you could maybe buy a decent tripod. But then no weather sealing and not as high quality pro images as L series.


For comparison of images and more details you can go through Bryan's review of these 2 lenses. Also, compare the weight factor for both these lenses against the lenses you have. I think 70-300 gives you IS advantage and extra reach.


But if you opt for 70-200 f4 L with IS i would go for that one


Good luck,


Daya