Ken, we have an 07 Sightseer and I love it. The Bunks for our kids have been great, and I can see the point for storage too. The plus to the 35J for us is the King Bed - we love that. The plus I can see to the 34M that I would like is the corner shower. I am personally not a fan of kitchen slides though, or having a chair near the cooking area. That said the barrel chair in our 35J was nearly worthless as far as where it was located and comfort. If the 35J had a corner shower in it I would go that way hands down.
2007 Winnebago Sightseer 35J
2007 Four Winns Horizon 190 Bowrider
2011 Jeep Wrangler Sahara Unlimited