So many good rods out there in pretty much every price range, ask 100 guys this question and you'll get 200 answers.
Also really comes down to the lines, fly sizes, and the individual caster, but I do think you're making the right choice with getting an 8. The 7 is nice on smaller water, and plenty useable on bigger water (my 7 also is a backup pike rod and I can cast 8-10" stuff well consistently 80' with an OBS, though I'll pick up my 9wt every time if I can for pike stuff), the 8 is a great choice for throwing doubles, more easily throwing pretty much everything, and fishing other roles.
The only thing I would recommend, is get an imported rod with an easy to deal with, no BS warranty that doesn't have a high fee. Big weighted streamers, multiple shot nymph rigs, big fish...more likely to result in a break than other pursuits. My friend fishes TFO rods, and he's broken 3 of them, but he always gets a new rod back within a week of sending it in.