I have a LG6040N from G. Weike. It has been in use for several years now and I've not had any issues with it. That will come in a bit below your budget. I have a 80W RECI tube in mine. I recommend specifying a Ruida controller. It runs RD Works which IMHO is better that Laserworks.
Have you had a look at Justaddsharks? The carry Weike machines and their 60x40cm machine is £3500 excl. VAT.