Which bond tank to buy

I am a returning player with plenty of bond equipment so am not looking for more.

I already have the patriot, and strv.

I am deciding between the mutz, the m4190 gf and the obj 252u

I know the 252u is the best of the 3 but I already have an is6 so dont need it for the crew training. I don't have any German light or med prems.

Is the 252u that much better that I should get it instead?