Gamefan I am really into the MTXL but its a special beast. If you are not intro monstertrucks it makes little sense. Its not that fast. Its wobbly because of those ridiculous tires. What it is, is fun if you have an area where it can stretch its feet. If you have mostly flat land, its not the right vehicle.
If I was go out to get a great all arounder I would pick up an RCMK XCR 1200 in a heartbeat. It is designed by the same guy that did the DBXL from what I understand. The XCR is just an all around better drive out of the box. In terms of spare parts you are pretty much stuck with DDM as the brand is really a boat brand that just branched out into cars with this, so its not well known outside of boat enthusiast circles and I have only seen DDM pick them up?!.
Or something more exotic like Elcon which is pro buggies. Hard to beat in terms of quality. The reason to go with more exotic pro brands is that you genuinely get more fun for your money, even if you get less stuff in the box. The feeling of control and feedback you get from a model vehicle made for scale racing which is in its 3rd or 4th itteration is really something else. Also for bashing.
A new player which I have been eyeballing is 30 degree north. They have just released a buggy that looks badass. They did a losi 5t clone which was really good. This buggy is down the vein of Losi 5B. On paper its specs is great, lots of bang bucks and I personally think its looks is menacing.
If you want the least hassle with the most spare parts available everywhere go with HPI 5b,
Losi 5ive-T or 5ive-B or a clone of HPI or Losi. Personally I really fancy Losi 5ive-B but 5ive-T has much wider 3rd party support. Also, right now there is a surge of desert truck/Baja trucks comming out left and right. Worth to keep and eye on if you like that stiff back axle design.
HPI's 5B is without competition the most versatile LSRC. Second to none. Whatever you want to build the platform into, you can be certain that someone has already build the parts. Monstertruck? Yes. Desert buggy? Absolutely, several. You want it shorter? longer? The parts are there. And it is a lot of fun but its also a fickle driver. Its takes some modding before you can just floor it without a care.