My thoughts are I can buy 8 or 10 nice William's System 11 machines or 4 or 5 good DMD machines for what a MM cost and I know I'll have a hell of a lot more fun with a bunch of machines than I would with just one so my answer is NO.
Being very honest I only have one or two machines in the top 25 according to IPDB but for less than you would pay for just 3 or 4 of those machines I own over 25 machines in the top hundred. And regardless of what anyone says I think I'll have more fun with the 25 machines in my gameroom than most people owning a half a dozen of the "top titles".
To me more machines makes more sense than having "A" list titles but that is just me. Regardless of what anyone thinks I think everyone has to do what is best for themselves. But the bottom line is personally I would never pay even $5000 for an old used pinball machine even restored. Why do that when $1500 to $2000 will buy you something you can enjoy just as much or maybe even more?