Most find the SRS a bit on the heavy side for PRS-style competition, though I personally find the balance and ergonomics (and modular overall length) a plus. Ditching the mono-pod can help with weight saving.
The magazines have always been a bit of weak point with the platform, especially with the earliest spot-welded bodies. These days they're definitely better, but have the challenge of trying to work with a pretty broad spectrum of cartridges. My take is that they work well in the common short-action and long-action cartridges they were designed for, but suffer a bit with the intermediate cartridges. Short Action Customs can do a "mid-action" modification that makes those intermediate cartridges feed more reliably. They also make +1 mag extensions. For most of the 2010s people were begging Desert Tech to make larger capacity mags for competition, and they are finally available now, but they are pretty long single-stack mags. My suggestion would be to just get standard size SA and LA mags and see how they work for you. If you find that they are too limiting, then try one of the larger mags.
The SRS Soft Case is really versatile and has a built-in mat. That's another item I've had for 10+ years, and combined with a Pelican hard case, I've taken my SRS around the world many times. The soft case isn't cheap, but it's optimized for using an SRS: it's got dedicated pockets for tools needed to switch barrels, extra bolts, mags, and an extra barrel. I have a number of shooting mats that I use with other rifles, but the SRS mat is kind of perfect for that rifle. And fully loaded it fits in a Pelican 1750 easily. You could buy a cheaper mat, but it probably wouldn't be able to also stow your parts and tools.
Bipods and tripods are too much of a personal preference thing, so I can't really recommend one or the other. I spent almost my entire Army career shooting off of my ruck.