Hi there, I use the Podhd500x for vocals and guitar live, i have the spider hd150 and im wondering the best output option, atm im going xlr L to mixer for vocals and xlr R to the amp using a XLR to jack, but is it best for me to go 1/4 inch jack to desk and 1/4 jack to amp? XLR is best for Vocals but im wondering if its best for guitar or not?