I understand your reluctance regarding computerised machines. Much as I like the many convenient features they have, I've read (today, in fact) that the motors tend not to be as strong as those in mechanical machines. How true that is, I don't know. For short runs, it probably makes little difference, but continuous heavy duty work rinks burning out a less powerful motor.
Regardless, I was in a similar position to you not too many months ago, trying to choose between several different 'heavy duty' machines. After a huge amount of research, I settled on the Janome HD5018 sold exclusively by Sewing Machines Direct. It is, as far as I can tell, identical to the Janome HD3000.
FWIW, the SMD Janome HD5018 is £50 cheaper than the Janome HD2200
I chose the Janome brand over others after reading about how well engineered the machines are, that Janome makes machines for many other brands, and seeing how generous the all-metal chassis is in the machines.
Good luck in making your choice.
PS What are the symptoms of your dead PC? ICT is part of my job, and I have fixed plenty of PCs in my time.