peli kan,
I appreciate what you're doing, because I've done it myself. I think you should give a Wilson Sting midsize graphite a try. Nice weight and pop, very stable, a poor man's version of the Pro Staff 6.0 -- sort of its cousin from the wrong side of the tracks. It's 85 sq. in., a little more than 12 oz. -- very sweet. Plus, there are a lot of them, and they cost about $20 to $30 max on e b a y, about 20% of what a 6.0 would cost you. They were manufactured in the mid-80s. But don't get a Largehead version -- that's over 100 sq. in. Or the High-Beam, which is a 95-sq.-in that came out in the 90s. That's a wide-beamed, lightweight, cheap racquet, nothing like the original.
Other possibilities, from my experience:
Spalding Tour Pro Graphite or Spalding Graphite Legacy, both midsize, cheap and under-rated, IMO. They play as well as the Black Max or Kennex Aces or other mid graphites from that era.
Volkl Tour 10 or Tour 10 V-Engine mids
Gamma Tradition 20 midplus
Pro Staff 6.1 classic
Donnay Cynetic 1
Donnay Pro One International
If you would like to try a Pro Kennex Ace, I would suggest the Copper Ace, very affordable and the most comfortable, flexible of the Aces, in my opinion.
I think that the Donnay Pro One International plays the closest to the Dunlops you now use. It has almost identical specs, if you look it up on the Tennis Warehouse racquetfinder.
If you're thinking of other Dunlops, I'd also suggest the Muscle Weave 200G, which I like much better than the Hotmelt.
Good luck, and please report back to the group if you find something you like.