Recommendations on Preventative Maintenance

I've had a few Volvo wagons in the past and I just picked up a '93 245 with around 250k. It is an auto, no crash history. Body is perfect.

I need to make this thing as reliable as possible (and I mean reliable!), what recommendations do you have? I'm not afraid to drop 500-1000 dollars on it as I got it for a steal. I'm comfortable doing just about everything mechanically on a car except actually tearing into the engine itself.

What I know has been done recently:

-Timing Belt
-Water Pump
-Presumably tentioners
-starter
-igniter
-Fuel pump relay

What I plan to do:

-replace all vacuum lines
-engines mounts and transmission mounts (and any other big rubber I can find), I've only driven the car for about 30 minutes, but I noticed a lot of driveline slop
-battery
-complete fluid change
-complete filter change
-injectors??? (is this worth the price?)
-oil trap if it has one
-possibly springs and struts (felt really bouncy)

Anything else that I should do? Overdrive on the transmission seems to work, so no problem with that. I did notice that when you floor it, it bogs down for just a second then revs up (thoughts on what that might be?), it feels almost like a carburetor that is out of adjustment.

Thanks!!!!!