The fretless 5-string deluxe alien rockbass got a good review in bass guitar magazine last year. Looking on the Thomann website they quoted a price of £540 or so shipped to the UK. Never seemed to have any in stock mind, with likely arrival dates of Jan 2011 and Feb 2011 passing. When you look now, the estimated time of arrival is June 2011. Don't know what issues they are experiencing. I believe the fretted bass is more universally available. Will hold out till the fretless becomes available......
Good way of getting into the acoustic bass I think. If you really get into it you can always save up for the non-rockbass equivalent. Mind you, that Tacoma 5-string is very appealing.
You'd like to believe that Warwick tried solid woods but didn't think there was much advantage. Who knows.......