Here's a thought. Check out eBay. Sometimes you can get discontinued models for next to nothing on there. I love the 750 size as well and have one on one of my 7' B n' M rods. Carries 2# test very well and this has been my no. 1 jig and casting rod for many years now. Not sure why they discontinued the 750? Darn good reel in a perfect size. They use to skip from the 750 and offer the 1500 size as next in their size up line-up. Maybe the 1000 is a compromise? I've had no experience with the new 500 size. Check the specs. and compare them to the 750 and see how it stacks up. Being a Shimano, it should be just fine.
"A voyage in search of knowledge need never abandon the spirit of adventure."