looking to buying a new class A we have questions ???

If you do get a brand new gas motorhome, it won't have the V10 engine, but rather the new 7.3 V8. From what I've read, the performance of the new engine is just fine. Long-term reliability and general longevity of it are a little bit of an unknown, since it's new, though my hunch (and it's nothing more than a hunch) is that it will be decent in those regards, too.