Howdy, I'd like to offer an opinion, but it is just that.
I have a 24 inch turkey gun with the removable chokes. Its a very nice little gun that I paid roughly $145, but there are a couple things about it. One is the stock, it is cheap palette wood stock and the paint on mine just decided to chip off like a mid 80's gm car. I have stripped the paint and am just about finished staining and refinishing the stock, but it is cheap ugly wood and there is only so much that can be done to it. The second thing is that I doubt that I will ever shoot a 3.5 inch shell out of it. Other than that, It is a fine shotgun that I have a great time shooting.
For my father's 68th birthday, I just recently got him a 12 ga TDC. He wanted a light little single for block shoots. The TDC has a nice vent rib barrel and the walnut on it is much better than the palette wood stock. I paid about $180 for it and can't wait to give it to him. The first block shoot is about two weeks before his birthday, but I think I am going to give it to him a little early this year.
If I had to choose between the TDC and the 24" turkey gun, I would spend the few extra bucks and get a TDC. That being said, when I was in the local gun shop picking up the TDC, there was a used 12 ga pardner with a fixed mod choke. It still had the hang tag on it and looked like it had never been shot. It was marked $60, but after a little haggling, I was out the door for $45 with it in hand.