An informed and emphatic vote for the Whippet here. I have run one SS (so can’t comment on front mech, etc) for over 6 months now and i LOVE it. If you like a long-n-low position/cockpit and you’re happy with the fairly steep head angle i would do it. Despite the angle, with SID RLTs up-front, it has not let me down on descents yet.
Only downside is it creaks to buggery. Every component/frame interface seems to emit noise. Not sure if it stops or i get used to it but after an hour or so of riding it seems to ease up. BB was a culprit but i have dismantled a couple of times and all seems OK + has got a little better over time. On One have reassured me that if any frame damage does develop the warranty will cover it. I just need to schedule a proper once-over in a year or so.
The creaking is really a small compromise when considered alongside the number of grins it has delivered so far. It’s really nimble and acceleration is amazing. It regularly gets picked over my 3yr old much loved P7 and the full-sus that cost 3 x the Whippet!