Hey Nick i can't talk about the performance of the new rod and the saragosa just yet as i haven't had a chance to try it out yet.
But i can talk about the diawa saltist. i'm running my saltist 40LW (low speed) with a penn 10-15kg rod with 50lb braid. It replaced a TLD25 on a shimano Tiapan 15-24kg rod running 60lb braid. The upgrade was astonishing, i could never go back to using an older style reel like that. The saltist is a much lighter and more compact reel which is more ergonomically sound to hold onto. It winches up 2kg of lead from 60mtr with ease, and the drag is so so much stronger, no more having to thumb the spool to hold the trout out of their holes, or to turn the head of those big reds or GT's. The overhead is a cheaper option, but it really comes down to your personal preference.
I was planning on buying another saltist overhead instead of buying the saragosa, but when we head out to the reef i prefer to have a spin reel and an overhead. The spin reel incase we see schools of macks/tuna/trevally on the surface and overhead for trolling. So i decided to spend the extra money and buy a strong spinning reel that can double as a deep water fishing rod/jigging combo.
The retail for the saragosa is $490ish and rod was $160. If you shop around you can get it alot cheaper, i ended up printing out a quote from cambells pro tackle and my local pro tackle store matched their price.
I think any new combo you will be happy with, but you'll have to wait for good weather before i can tell you how the saragosa will go. I'm just a little concerned i won't be happy with the rod because it's a 15-37kg, a lot heavier action then i normally use, but the sales guy guarenteed me i would be dissappointed if i got the 10-24kg rod.
Hope this helps
Josh