I have owned and fished a large variety of Loomis rods. I personally prefer the Senko and Jig/worm models over the MBR series. Many people will tell you the MBR 844 or 843 are the most versitile rods. I personally liked the MBR 843 over the 844. If your budget is tight and you can't get the GLX model, then the IMX MBR843 would be a very good choice for an "all purpose" rod. I sold my 843 and 844 and gave my uncle my other 843. He uses that rod extensively and has caught numerous bass in the 5 pound and bigger range with no problems. He uses it with worms, senkos, plugs and whatever he can tie on the end of the line. That being said, it will NOT be adequate for flipping or fishing heavy cover such as lilly pad fields or thick, matted hyacins or slop. It simply isn't big enough.
Why did I sell the 843 and 844? Because I went to the bcr893 and bcr853,GLX models. The bcr 853 is an excellent rod for T-rig worms and jigs under 1/2 ounce and fishing in semi-thick cover.The rod seems light but has plenty of backbone to move fish away from cover.
At some pont I started fishing Senkos more than worms and found the bcr893 to be superior than any other loomis model, except the NRX. I bought two 893's and got rid of the 853. The 893, hands down, would be my choice for senkos and worms. The rod is light and very sensitive. It also has enough balls to move fish away from cover. The 893 can also be used with spinnerbaits, even though it's 7.5'.
I have since sold both 893's and upgraded to the NRX, which is in a world all of its own.
My best advice, for what its worth, is this. If you fish primarily soft plastics such as worms, senkos and fluke type baits and cannot afford the NRX or multiple rods, then, without a doubt, get the BCR893 GLX.
If you fish a variety of tackle such as jerkbaits, topwater plugs, cranks, and plastics and can't spring for technique specific rods, then I would suggest the MBR843 GLX or IMX.
DO NOT waste your money on any rod below the IMX model, such as the GL2 or GL3. There are other brands for less money that are as good or better.