Hi Cliffisen,
If your main goal is to paint illustrations and to later paint T shirts, I would look at getting two types of paint that are specific to the job.
If you are new to airbrushing you have to realise that there is not really a "one paint fits all" and each paint tends to be used for certain types of airbrush work like; automotive and hard surfaces or illustrations on card, board and canvas or T shirts and fabric work, amongst others, although some paints can cross over they are better at their main target area.
For illustrations I would recommend Com-Art (especially if you are learning), Etac FX (if you have more experience) and there is Createx Illustration paints but I have only used the White. I paint mostly illustrations and have tried many paints (not Wicked) and always go back to Com-Art. Illustration paints have the ability to be erased and are rewettable which are techniques used to achieve stunning effects when painting. I believe Wicked does not lend itself to these techniques so well, but like I said, I've never use Wicked so I can't talk from experience.
As I've only painted a couple of T shirts I'm no expert and there are a few fabric specific paints out there like Createx, Spectra Tex and Medea Textile paint (Medea and Com-Art are made by the same manufacturer). Personally I chose Golden Fluid paints mixed with Golden Airbrush Medium which worked very well for me and is supposed to be a very good mix for fabric painting and it doesn't need Heat Setting as other paints do. It will cure if left for 4 days to air-cure but you can heat set it with an iron if you want.
Cheers Mel