Best cyclocross bike under £1000 and other CX chat

Bontrager Jones XR 29er 1.8" (46mm). Light, with low tread. I've seen plenty of reports of folk running them tubeless. So combin them with some Stans crest rims, and run them at a nice low PSI.

Would half the rotating weight of your set-up, reduce punctures, and enhance grip. Probably a touch slower on tarmac though.

Could be a good future option but the Land Cruisers are pretty puncture resistant (I seem to live in a very puncture area with sharp bits of flint so put puncture resistance high on list) 'light' MTB tyres tend to puncture about once a week when I used them years ago and tubeless wouldn't stop those sorts of punctures I'm guessing?
I also ride 50% on the road so at the moment am happy with the combination I have. Surprisingly the weight doesn't make as much difference as I thought it would.