Ok , you have a very reliable machine, with good support , vhf sell machines with other brand names, like Jensen, ivoclar dry, 3m, preciso milling, and is the same k5, and for you is good because you can use the same cam and cnc software , you don’t have to spend more money a training. And also with the same machine you always order the same burs and maintenance kits, I have seen k5 between 10 k and 18 k and is a work horse and you have many company’s giving support, like ivoclar, Jensen , vhf and allien milling. The spindle Is cheap and easy to replace, is a Jaguer German handcrafted. So for many many reasons I will advice you stay in vhf also you can get the new N5 , it needs no compressor line.