What's a good one ?
I have an SKB double compound case with TSA locks that works very well. I can pack 2 bows, arrows and a bunch of other stuff in there with ease.
I also have a Redhead roller duffle bag from Bass Pro Shops that I used on my last Africa trip. It has "hard" section on the bottom that zippers to a duffel bag on top. It was awesome and I got everything in it. It will be my goto bag from now on when I can fit everything in it.
Here is a link to the BPS one I have: http://www.basspro.com/RedHead-Canvas-Luggage-Collection-Oversized-Wheeled-Trunk/product/1108311825805/?cmCat=CROSSSELL_THUMBNAIL
I have shipped my bows and hunting gear ahead of time to my outfitter/destination using well constructed cardboard boxes via FedEx to avoid the hassle of flying with my gear and potentially have it lost or TSA held. I pack one takedown in my checked luggage so I can practice the last few days prior to departure. When I get on the plane, I know my gear is already on station.
My wife just bought me the new Lakewood products case from 3 rivers holds a lot of arrows and u could fit 2 takedown bows I think. It's tough and airline approved and not heavy, I'm looking forward to using it on my Canada trip this spring