its true that consumer computers being used more and more for things like sonar,back in the day one would build their own of have one built to do high technology digital recording like we do now a day.
but places like best buy,tiger direct,new egg have made it easy to afford a really good computer.
but and i say but !!..there are tweaks to be made first,one being install a fresh operating system with out the bloatware,remove the extra large 1 tb hard drive for a smaller 360 or 500 gig for your os and sonar install,use the 1 tb hd for samples,audio data,projects.
and now for under a thousand dollars one can get a decent 17 with 12 gigs of ram.