Personally, owning the Thumb I have(the one you mentioned) was the greatest thing that ever happened to me bass-wise. I play SO much more than I ever did with my old Fender, and even better than with my Conklin. Pardon the length, but since I have extensive knowledge on one of the basses he is asking about, I'd like to inform him of my thoughts on it, before he plops down the dough for it. Just trying to be helpful.
The Review
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The Bleach Blonde does not suffer from what some of these guys say is downfall of Warwick. I find that the swamp ash and maple allow a great variety of tones, even with only a 2 band EQ. More versitile than the ovangkol warwicks i've played.. then again you don't buy a traditional Thumb for variety. I also find it has some of the sweetest highs I have ever heard in my life, and I've played a multitude of Warwicks, Fenders, Pedullas, Ernie Ball products. You pay for those highs by losing the defined low end of a heavy-wood thumb. It still has enough punch to break your neck though. It is certainly very light, probably the lightest Warwick I've played, though the Hot Rod(having a chamber) gives it a run for its money. I've never had neck-dive issues. I do, however, have very small hands, and it took a while to work my speed back up as compared to the amazingly contoured Conklin neck I played on for 2-3 years. It has a very very soft and thin finish on it, with the swamp ash being some of the softest wood I've ever seen. So if you obsess over nicks, this bass will break you pretty fast. It is not oiled, so any nick will stay there.
It keeps its tune forever. The hardware is either a dream or a nightmare. Why? Well the bridge allows full 3-D adjustment. The spacing between each string can be adjusted, along with the usual height. If you get the strings set up, but need all of them higher or lower, you can raise and lower the whole bridge as well. The Adjust-a-nut 2 is great for getting low buzz-free action, being able to raise and lower the nut is probably my favorite tinkering thing.
I definately think the ergonomics are hit or miss with people. I happen to think it fits me like a glove, I do not think I'll find a bass shape more comfortable to me. Many people that don't like the ergonomics also like to sling their bass at waist level. I prefer mine closer to my chest, since I have short arms. The Thumb is MADE for this position, and really shines there. I also have a fetish for thick leather straps, I get the feeling alot of these guys use nylon straps with super slick coatings or something on their basses lol.
Basically, with Warwick, there are 2 kinds of people on this forum. Ones that love it, and ones that can't get past the neck and weight issues to hear the beautiful tone you get. Both types are very vocal. Its body is just one of those innovations that fills a certain niche, and if you weren't looking for that niche, you're likely to hate it.
I know my review seems overly positive to some of the Warwick haters out there, but then again, us Warwick lovers see the complete bashing of Warwicks as overly negative. Especially with the variety of basses Warwick has. You can't judge the whole line of basses from fiddling around with a Corvette standard or a Thumb for 5 minutes. Its all persepective.