could someone recommend a decent power cord to use with gsx-mk2 amp 110v version under 400.00us?
I asked this question to Chord Electronics a few years back when I acquired their great Choral system ($60,000 +) as all the units came with bog standard power cords that cost no more than $20 each.
Their answer was along the lines that it doesn't make such a significant difference whether they are fed with their standard power cords or a $2,000 one !
If you have a high end system with excellent interconnects and speaker cables (which are very important regrading their quality - not so much with XLR interconnects unless excessively long runs ) and you want to spend a lot of money just for the sake of it just to get a very small sound quality improvement (that may be inaudible) then go for it.
Personally I would rather spend $2,000 + on another important component i.e. the source or buy more music than spend it on snake oil power cables.