Have plenty of experience of Tornados and Lencrafts, not as big as the 8.5m versions, but have driven plenty of 6-7m models.
To put it simply, I would choose Tornado hands down. Much better quality, better hulls and a soft dry ride. Build quality is exceptional and they are finished to a very high standard. PU tubes won't fade, scratch or wear as much as hypalon either although some say they can be harder to repair??
The Lencrafts by comparison are slow, heavy, wet and can give a hard ride. I know somebody who will be changing his Lencraft next year for a Tornado if you want it, but trust me you'll regret it!!
Go for the Tornado definitely ahead of the Lencraft!! Alternatively: Redbay, Osprey, Excalibur, Humber and I hear that XS-Ribs will be expanding their range to include 6.8, 7.4, 8, 8.5 and 9m models this Winter!!
If In Doubt, Go Flat Out!!