Steve,
Rio Versitip might be a good choice as it appears you already show some brand loyalty to Rio. According to their literature, the Versitip was created from the Windcutter design and developed for exactly those fishing situations you described.
I've got a Versitip system in 8-wt that I purchased in 1998 and it is still going strong. Though I use 30 foot shooting heads and small diameter sinking running lines to get deeper, I still use the Versitip wading if I'm using the 8-wt. 15ft tips plus belly gives you a 38-foot head and, once you discover that is what needs to be outside the rod tip during the casting stroke to load on the rod, good distance is easily achieved. Any potential hinging effect is greatly suppressed due to the welded loops. The system now includes a 15-foot clear Aqualux intermediate sinking tip as well.
Haven't used any other manufacturer's product so can't comment on them, but for what its worth, I can say I've been very pleased with all the Rio products I've tried and use. Their website is
http://www.rioproducts.com/.
Greg