If you don't have the budget for an Atlas, then the basic Harris BRM-S (6-9", swivel, leg-notch) with the addition of a pod-loc at ~$115 total will work just fine until funds allow otherwise (or for the long-haul for that matter unless you just WANT to upgrade down the road).
As for the above recommendation on the Harris, BDS spigot mount and DLOC...well that's just sort of nonsense when you realize how much you have invested versus going ahead and opting for an Atlas with Spigot setup in the first place, but to each their own I suppose. I do prefer the spigot type mounts with any bipod on the AICS as it gets your bipod mounted out a lot further which will give you added stability over the basic swivel stud mounted closer in on the rifle.