Funny you should ask... THIS week. Week before last week my answer would be different.
Our coach runs right at 14000 and we have a V10. Most of our camping is near home in FL and I'd felt V10 was overkill.
Week before last, we went to the Blue Ridge mountains in northeast Georgia. Towed a Corolla. That trip made me glad it was V10. Even wish it was bigger...
So, unless you plan on being MUCH lighter than the 16000 or so that we were on our recent trip... V10!!! I was Just There and Just Did That.
For the Winnebago, wonder what they're up to. Most of the time I see a consolidation into the E450 with V10, even in smaller coaches. My vote would be to look for a leftover '15, wait for a '17, or push for a special order.
As noted above, E450 is standard with V10 but E350 offers both.
If God's Your Co-Pilot Move Over, jd
2003 Jayco Escapade 31A on 2002 Ford E450 V10 4R100 218" WB