Happy New Year Toast -
Of the grills you listed, cooking for two, my choice would be the WGA. (the rectangular Weber).
If portability is NOT a consideration, put lit coals in the charcoal ring of your WSM, sit the lower cooking grate on top of the charcoal ring. Voila, an 18 inch charcoal grill.
My Boys: Joseph (EI); Andrew (EE); Daniel (EE)
My Toys: 10 WSMs (B, C, DH, DA, EZ, DZ, EO, DU, DR, EE/DU mutt); Brinkman Cimmaron; Chuckwagon Cooker; 5 22.5" Bar-B-Q-Kettles; 1 18.5" Bar-B-Q-Kettle; 3 WGAs (EZ, DE, N); 3 SJPs (DT, DR, DR); 2 Smokey Joes (A, K); Genesis Silver C (DU).
"For when democracy becomes tyranny, those of us with rifles still get to vote"