Although I disagree w/Arainach's comment about recabling only making a "miniscule difference" (I've had several pairs recabled from budget cans to high-end 'phones and it
always made a difference - not always for the better, though!), looking at your source + VERY high-end amp (designed with IEM's in mind, though

) + VERY high-end line-out cable - all feeding a pair of lower end Senns - confuses me.
Unless you've got some special emotional attachment to these cans (hey, I'll never sell my SR60's!!!),
save the money recabling would cost you and put it toward upgrading your headphones. Your source, amp, & cable will appreciate it and your ears will thank you for years to come.
zD