I think that all of the 90's pins are worth a look to a degree
Some are easier to maintain than others, for example the DE/Sega displays that were in three sizes tend to be very expensive to replace (eg if you get a large dispaly Sega game) and DE boards are a bit harder to come by
There are some great games released by GTB, DE and Sega such as Phantom of the Opera, Waterworld, Nightmare on Elm St, Jurassic Park, Stargate
Equally, I think some of the Bally titles skimped a bit on their artwork in favour of featues - eg I think T2 is a great game but the playfield is quite plain - Judge Dredd on the other hand captured both elements.
Hope that helps
