Upgrade from WSM to LSG? or Klose? or Mgrills?

Hi Folks,
This is my first post. Hope you can help me. I'm having decisions issue. I currently own an 18” WSM, an 18" kettle, a 22" kettle and a gasser. I’ve been grilling for 10 years, and smoking on the WSM for about 4 years. I’m decent but still learning. I cook for 8 people (6 kids). I do a few parties every year and cook for my work occasionally (30-40 people max. I’m ready to upgrade to something bigger but I’m not a caterer and don’t want to waste money on fuel or go too big. The main use will be grilling for my family and occasionally smoking (I’m still going to use my WSM as I have modified to suit me perfect), unless my wife make me sell it.

My current challenges are that I don’t have enough surface area. Also, my dad says he wants me to cook a suckling pig for him for a very special event. Here are things I’ve been considering:

Klose Chef Grill 20x42 with Fire box. Pros: Fire Box, adjustable grill distance, small pig possible. Cons: Too big? Wide variance of heat from left to right according to older posts? Too heavy to take to work? $3,300 plus shipping. Currently my number one pick. Perhaps I could tune it with plate on the charcoal grate to make it more even. Would make a good grill.

Assassin Grill 36 or 48. Pros: lots of customizations, water pan capable, small pig capable, least expensive, easy to take to work. Cons: Grate not really adjustable. Doesn’t seem great for reverse searing steak, unless I got the 48 and set up two zone. I don't feel I'd be gaining versatility, just sq in.

MGrills M36. Same pros and cons as Klose, with the exception that it costs a little more and has no access door to the charcoal. The side tables seem a bit small. I have not seen any reviews other than by the mfr. Previous posts about left to right temp variation on older M1 had me concerned.

Lone Star Grillz Adjustable Charcoal Grill. I can’t seem to find much on the internet about users experiences here. Pros: the adjustable grill has the easy to use design. Most the time I would only cook on one side. Cons: despite its size I don’t think it would be good for a pig.

Other Lone Star Grillz: I can get a charcoal grill insert for LSG offsets, but I don’t know how well that would do as a grill. Reverse searing a steak is more importable then an adjustable grate, which this can do.

Questions. Does anyone have insight to these options? Has anyone used the charcoal grate option in the LSG? Any other pits I should be considering in the 2-4k range?

If curious minds want to know, I've narrowed it down to LSG and Klose. If anyone has advice for me, I'm happy to listen. Anyone with experience using the LSG charcoal basket?

Nice insight and thanks for the pics. I will check out those grills as AZbbq. I have looked for a few builders locally but google searches bring up very little in terms of options. I have looked at some santa maria grills (engelbrecht? if I recall). I'm used to the tight sealing lid of my gasketed WSM and these big metal cookers I think will be a whole new ball game.

I like the MGrills alot. They have some new options coming out for a thicker firebox door I believe. Also, you can get the unfinished metal look (with lacquer) that Travis uses in the m36 video. That would be cool. If the M36 had a charcoal access door, it might be the perfect grill/smoker combo.

It's funny, the 357 was the cooker that got me considering something bigger in the first place. I'll go back and check it out some more. I did not realize if was double walled. I will say this, the process of me searching started back in February. My dad keeps teasing me I can't make up my mind. I want to say to myself that I did my due diligence.

Thanks to all who responded. I ordered the Klose today. I will provide an update and review once I get it. I'm hoping this is in the next 5-6 weeks. For those who are curious, I ordered the 1/2' firebox, but no other upgrades. I hope to may a mods of my own after I learn how it works.