I think in the 90s lots of good options out there, in the 4-5K range it does limit but one option I would consider is Baywatch. Good value for the money, layout from Balcer is good and lots of different shots, multiball is balanced very well with scoring with modes of the game. Just a fun pin and actually a good shooter. Really clean ones are 4K and less for ones that need a bit of TLC.
X2 agree with Sataneatscheese Stern ST Pro is a great option and priced in the low 5s. Fun layout and modes are balanced well in scoring.
BSD is a pretty brutal game and seems to be all about stacking the multiballs so not sure it fits the criteria you are looking for in a tradtional mode or multiball balanced scoring game.