A good friend of mine is a screen reader and he likes looking at tables no more than I do, when I read your code.
Anyway, the CSS way is much more intuitive and easier to use, because your objects have independence and you don't need to scramble your tables to add a little design fix later on.
...I say that because I've been through both tables and CSS. My tables went as deep as five level-nestedness for accurate positioning and for total subdivision of images to optimize them better with a gif compressor. But what a fool I've been. PNG is lossless - 100% true colour quality and it replaced my connectionbusting army of 50+ gifs with a net reduction in size of about 60%.
hmm trailing off here, but check out http://burnallgifs.org/.
Good luck with your tables.