if you are really set on buying new then by all means go for it, its definitely your own choice- also its good for guarantees etc.
Anyhoo, I'd say that the rockbass if definitely a good buy, its a nice midrange bass, worth a sling I'd say!
All this is bringing back memories of trying to find a left handed 5 string a few years ago and being told they were virtually impossible to come by. Thank god for this forum, its been great for my rig, although not so good for my bank balance