I've never been a fan of the ovations but Mopar is correct that they are a bit smaller in the neck. It seems like people who have them love 'em. They sound fine I just don't like the way the body feels. You are smart to consider used, you can get some really nice instruments for dirt cheap. I think they sound a bit better with some wear and tear. When buying used never ever pay asking price unless they are giving you a super great deal. Compare what they are asking to what a site like guitar center has it listed for. A lot of times people are still trying to get retail for the used instrument so always make an offer lower than what they are asking for and be willing to walk away if they won't budge.
I sold a Fender acoustic/electric on CL once for $250. I only wanted $200 and may have gone lower. Guy comes by, plays it for a bit, knew his way around the instrument much better than I did. He's getting his wallet out and I was waiting for him to make an offer, he paused for a moment like he was going to then just handed over the full amount. I was stunned but stoked.
I got a good deal on one of these
guitars several years ago. Paid $600 when it was retailing at guitar center for around $900. If you are able to find one used or on sale I highly recommend it if it is a good fit for you. I haven't checked out Takamine's other models but they have a good reputation. The neck is a nice size.
Good luck.