I have an fluval c3 on my 20 long, installed it 4 days ago and im loving it so far, it has an adjustable flow and runs really silent, all you hear is water trickling. It was a little more expensive ($45) and was probably bigger then I needed (fpr 20-50 gallons) but for a 29 it would be a good choice or go c4 for extra filtration which is always good. I like all the separate compartments and the ability to customize the setup like taking out the carbon for example.
Also to add to the post above, the aqueons pump being inside doesnt matter that much and as long as you're not trying to keep goldfish or cold water mountain stream type fish it shouldn't effect you at all. Yes it does put a small amount of heat into your tank, but also gets dispersed bet quickly being right underneath the flow it creates. It doesn't produce more heat than the water releases due to ambient air temp unless there is a problem with the pump already
3rd edit: haha. To add I actually like the way the pump is set up on the quiet flow, makes cleaning or replacing the impeller really easy, you don't even have to take the water filled part off the tank