I have a 2003 that I bought 2 1/2 years ago with the V10 and now it has 50865 miles on it. In my opinion they are a great built coach. I have had some problems (front roof A/C replaced, and refrigerator cooling unit went out so replaced with a residential) but I still wouldn't hesitate to buy another one of the National models. That being said mine is for sale!!!
Actually, we are wanting to down size but truly love the Sea Breeze. Only thing I can tell you is to be careful what you pay for a 2004 because we have tried to trade ours and all the dealers we have dealt with only wanted to allow about half of what the unit is worth on trade! Like the above posts have already mentioned just make sure you check everything out good. Good Luck and Happy RVing!