I prefer a pod up front and a bag at the back. I was using a knock off Harris but switched to the Mpod. It's so solid, it feels like I'm cheating.
When you're at the range take 5 minutes to ask around, see who's using what and ask if you can try it. I know I wouldn't have a problem with it.
Bipods allow some flexibility for height adjustment that bags may be more difficult to achieve.
Bipods like the harris need consisent preload to become proficient. That comes with lots of practice.
Personally I have always had an easier time using bags front and rear, but that is just plain practice.
If it twer me starting out I'd try the bags first as you can always move up to other options (ie better solid bipod constructions) and you'll find them useful anyway for all shooting purposes. If I were trying to find the optimal set up and had lots of cash...then I would find a fixed bipod within my budget and a good rear bag suited to the stock I will be using for the sport (ie F Class, F-TR vs varmint styles have different stock formations)
See what the target shooters are using in the line up, that will tell you a greater tale you may want to heed.