Truly quite a challenging questions, and a sad one just at the mere prospect of having to choose. I don't even know if I could answer that, but from my experiences so far of the line, I would say Need 2 Slin, because even though Bridge is an AMAZING product in my opinion, those pumps can be achieved through nutritional and VG supplementation.
I think Replenish is pretty awesome, I use it pre and post workout. I use gear pre and post as well, also first thing in the morning and last thing at night.