Feiger-
In response to your questions, I started out with a St.Croix 14'-9/10 and I thought it was a nice rod, I then acquired a used 9140-3 (old brown III)and lament having sold it, but then it has recently been replaced by one of the earlier ones, a real cannon. I then acquired that green graphite IIIe 9140-4, a sweet casting, forgiving rod and thought it was the cat's meow, faster, more powerful than the old, brown blanks. I could cast with a Windcutter 9/10/11 with up to a 200 grain sink tip with it (green) but more than that I felt I was taxing it. Yes, I agree about the 8/9/10, but I would seriously consider the Midspey 8/9 w/tips or the Airflo Delta long (less stipping in and shooting line) I was getting power hungry. Then I got to try a 9150-4 (bigger meow) faster and more powerful yet and ended up getting one on a good deal. Next I had the good fortune of getting that CND 14' 9/10. It doesn't meow, it roars. So, as you see as you begin your journey into the world of Spey casting, you will find yourself wanting something more, bigger and better. Fall not into the jaws of rapid acquisition and wallet emaciation, Grasshopper. Attend a speyclave and seek the wisdom and experience of the learned, try some lines that suit your casting style with your new rod and save yourself the anxiety.
With regard to the Ross reels, I strongly recommend the BG7, it will have enough capacity and balance better if you're going to use standard 30# backing. You will be pushing it with a BG6, especially with a Midspey line, that's why I went to gel spun backing, it's cheaper than buying another line or reel. A word of caution with gel spun, have it wound on tight. Due to the small diameter, if wound loosely , it has the potential to dig into itself and sieze if you hook into a hog that takes you that far into the spool. Also, I recommend using the Albright knot to secure the fly line to backing.
I hope I have been some help to you.
BTW- I know where you're shopping- good luck
ADP <")))><