ive been looking for budget tube or hybrid amps for my hifiman 400i. i really liked the little dot 1+. ive looked at a few other but never tried them like tor audio roger (theres one for sale here), hagerman tuba, and maybe another. what are your favorites?

anyoner use blue jeans cable headphone cables? the only ive used are whatever came with my headphones, in this case a pair of hifiman 400i. i have a coupla questions: at what price point i get clearly noticeable improvement? what are some models of headphone cables at that point? thanks