I REALLY dislike ashtons, I rode my mates for a few days when i was thinking o moving to stock and it was horrid, first off it was rediculously sluggish on the backwheel and for gaps and taps it felt like youd put all the power through and it would just get absorbed by the frame, rather than actually go into moving the bike. Ive had a go on porters aswell and it felt pretty much the same. I've never ridden a zenith for longer than 5 minutes, but th one i had felt mint, I'd go for that