I'm up to 127 tables and climbing.
I noticed that once I hit about 110 tables....the quality of available full screen tables starts to drop. There are some fun/playable tables, but the graphics aren't as razor sharp as some of these.
The coolness factor of Virtual Pinball that blows me away is the ease of which you can "upgrade" a table. I was playing TOTAN and thought the table wasn't that sharp. I looked up the latest vesion of it on line at VPForums and boom -- full screen HD glory. Sweet.
The machine really gives you a good feel for a real machine! I also am now playing machines I would never have access to in real life like Big Bang Bar. That's a fun game!