Riven1950, general rule of thumb is to settle on the cart, then see if the horse is up to carrying the load. If I've learned anything, it's that I =should= have gone 3500 instead of 2500, even though I don't really want something heavy enough to =require= the 1t. It just gives you more options if/when you go to another FW. You're looking at "half-ton" class FW's (a total b.s. marketing tool, IMO) in that weight and size range, along the lines of the Jayco Eagle HT and the KZ Durango 1500 FWs. Given they are "built light", they simply won't have the longevity that a heavier unit likely will have, especially if you're a frequent camper. While I think a 3/4t will easily handle the size FW you're looking at, you also have to look forward to the next FW where you might want a bit more comfort and size. The price difference between the 3/4t and 1t SRW isn't all that much, so consider it.
Lyle