I don't think Bachus goes out of his house, either. T5 looks a tad hefty for gigging.
Well you are right... But you are also overexagerating the weight difference
PSR 950 is almost 12 kg, where the 61 key Tyros 5 is 14 kg...
If you want to do some weightlifting, try my Kronos 88, thats 23 kg, and i know quite a few people that use it for gigging..
I thiink that those 2 kg extra for a T5 are worth it in every aspect espescially the better keybed and UI, SA2 sounds, organ world, ensemble voices, sound expansions(memmory)
However, s970, pa900 and SD7 are all good keyboards.