4-6 month old sitting and standing support equipment, what do you recommend?

JK
Our 4 month old just started rolling which is very exciting but now he hates being on his back, understandable but hasn't mastered turning back over from his stomach so just screams when he rolls to his stomach. Basically he hates being on his back and stomach, loves sitting/standing. 
I've been debating about getting the fisher price sit me up? Any other recommendations out there for this age that would also be good for when he wants to move around? I feel he would actually like to walk almost in something but prob too young