Hmm. It mostly depends on how many and which lenses you have for the EOS system, if you have just one or maybe two and these are the consumer type ( eg. 28-80 zoom), then I would say sell (if you can) the lenses and ditch the camera, and buy yourself a good second hand mechanical type camera for your slide shooting, ones that come to mind are Olympus OM 1 or 2, Pentax K 1000, or if your pockets are deep enough a Nikon F2, combine any of these with a good 50mm or 80mm lens of the same type as the camera, and you will have something that will take superb photographs and last for years with no trouble. However if you have more Canon lenses and they are of a better quality (USM or L type), then I would go for another EOS camera, a 3 or a 5 if the 5 is in good condition (check the command dial if its getting stiff forget it), I shoot with a 5 and just one 50mm f1.4 USM lens, and find it superb. On the other hand if you want a complete change, check out (if you can find one) a Rollie 35se, this miniture marvel with its superb Lietz Sonnar f2.8 lens will take some of the best pictures you have ever seen.
Good luck with whatever you do.