Yes, I'd advise trying a mid range 5 string first. Just incase the 5 string thing doesn't really suit you, it means you're not too far out of pocket with a high end bass thats hard to shift! I traded a Kubicki Ex Factor for a Status Stealth 6 string and whilst it was a class bass, I really didn't need or get on with having 6 strings, so I ended up selling it. It just wasn't right for me.
If you're serious about spending that sort of money, do yourself a favour and get a ticket to the Bass Gallery in London. Try as many 5 strings as you can from the big name brands and find out what you like. Even if you don't buy anything then, it'll give you some good pointers for your search.