It's a difficult choice - all three are top bats. I have just bought a RB Paradox LE and it looks and feels fantastic. I am still knocking it in so can't comment on performance yet but it responds well with a mallet.
I looked at various bats before plumping for the RB - I found it quite difficult going for a 'custom company' as unlike going to a cricket store and picking up various off the shelf bats and trying them, you would end up racking up the miles travelling to each bat maker. As you have probably done, I trawled the posts for reviews and owner's opinions of the bats before deciding which was a massive help. Once you have an idea of which one you may want to go for you could then visit the workshop (with the exception of Laver).
I ordered my Redback after sending and receiving a few emails from Gary who was very helpful and answered the many questions I had. If you haven't seen my RB the topic is here
http://custombats.co.uk/cbforum/index.php?topic=10218.0As you can see he produces some fantastic bats. I would also agree with procricket and jimba - H4L are also worth a look - I have an excel 5 star and that surpassed my expectations and is a very, very good bat.