Both are also sold in stores, so your local Best Buy may have this TV on the floor to see before you buy it.
Each have mostly positive reviews on BestBuy.com.
The review site Rtings.com gave the Toshiba a decent review, with good black levels and picture quality, but motion blur which will make sports and games look washed.
The Visio's review is better.
Even still, both are very good values at $300 and under.