For me it all depends on the quality. I mean a quality buffer will cost >100 EUR, so if a switcher with two loops and a buffer is 140, that's fair enough.
But I also had cheap relais switchers in the past that killed a lot of tone. The chain between guitar and amp is just very sensitive. The only neutral device I owned that is relais based is the Lehle switcher.
Other thing is that my ideal switcher would have some loops but the possibility to use each of the switches for amp switching purposes instead of looping tasks (maybe a small selector switch with each of them).