The first question I'd ask is what's your budget? Most of the major glove makers all have a 34' mitt, but the prices will vary a lot. If you're looking for an off-the-shelf mitt on a budget, go for the Rawlings Liberty Advanced. It can be had for less than $200 with free shipping.
If you're willing to spend more, either the Heart of The Hide, Wilson A2000, All-Star, Vinci, Gloveworks, etc, all make great options. Just understand that these options will take a lot of work to break in.
I can help you with the first four options, and I believe there is a Vinci rep on the board, so you can definitely save some money off of retail.