I started with my NBBD, which is similar to your Char Griller. After being here for a while, I made an UDS. Greatest and easiest smoker to use. A WSM is basically a fancy UDS.
If I could do it all over again, I'd still build my UDS. If you don't have the skills/time/desire to build one, then get out there and buy that WSM.
22.5 (B, DA, H, M), 18.5 (AU), Jumbo Joe (AT), Smokey Joe (N), NBBD, UDS, 6-burner gasser