Yamaha DTXpress/DTXplorer/DTXtreme

Hi. I am new to this discussion group(I just found the group
5 hours ago).
A bad thing happened to me yesterday. 
My DTXPress's (is I,not II,III) HH60 seems broken. Now it only detects
open & close, and no foot splash and closed sound anymore. If I have
to buy a new one(Hi-Hat control),can RHH130 be used on DTXPress I? Can
I upgrade PCY65S/130S to have cymbal choke & cymbal rolls feature(the
original PCY60 on DTXPRESS cann't do these)?

Or, It's time to buy new drum kit,such as DTXPress III SP ?
Any advices would be grateful.