The fact that you probably can manage a 44 means you are likely to save yourself some money. Most modern players don't want to go beyond 42-1/2, so the longer string lengths don't fetch as much geld. As far as size, bigger basses are often deeper, but that's not always an advantage. Every instrument has its own voice

. Again, you might find a big shouldered bass out there that others don't want because it's hard to play, so you might pay less than I would have to for a quality instrument. 7/8 and 4/4 basses seem to be more popular here in Europe than in the States. I have a new 4/4 Rumanian instrument in the house right now that seems very reasonably priced for it's quality, but I can scarcely get around it. You might contact someone who imports eastern european instruments and ask them about availability. IMO these instruments tend to be well made, but very poorly set up. Otherwise, If you keep your ears open and are patient, you might find a large old German bass somewhere near you that the owner can't easily play or sell, and would be happy to meet you!
Robobass