Rippstar

I picked up an old Raleigh Technium today. I'm not sure what year it is, but the frame is in really good shape (although a bit dirty) and as far as I can tell the components are completely stock. I'm trying to decide if I should just clean it up and replace the cables/housing, brake pads, bar tape, tires. Or if it would be a good candidate to convert to STI levers and maybe upgrade the wheels and brakes. Any advice/info/opinions welcome!

Raleigh USA Technium Olympian (Year:???)
6061 Aluminum main triangle (bonded to steel lugs)
Shimano Exage Motion brakes & levers
Exage 300 EX rear mech
Exage 400 EX front mech
Exage 300 EX crankset
Biopace 52-40 chainrings / 7-speed freewheel
Sakae bars, stem, seatpost
Brooks Saddle of some sort???
Exage Sealed Mech hubs
700c alloy Weinmann rims
Vetta bottle cage