Ive always stuck up for Sire basses. They are very good value and have lovely necks. Quite a few come up for sale on here. Ive got a gen 1 V7 and love it......or at least I did until i got a cheap Yamaha 425 (as has been suggested above). The Yamaha's are really easy to play, and the necks seem almost like a decent sized 4 string rather than a cricket bat. They might look boring and plain (they do to me), but the term 'Decent' can definitely, be used with these basses, even though they don’t have the price tag that makes you feel you have a decent bass.
Having played quite a few 5 strings over the years (and always gone back to 4's), my Yamaha 425 is by far the cheapest, and while it doesn't have active electronics/exotic woods/bells and whistles etc, its a very, very decent player and can hold its own with any of my previous basses as far as playability goes. In fact I'd take this over a couple of Dingwall ive borrowed, and a Lakland DJ5 I owned. Not saying the 425 is better all round, but it has character and power, which the Dingwalls I borrowed lacked. That might of course be a downside if you don't like the tone, and the pups on the older low end Yamaha's aren't easy to replace.