I dont know where you are Kicha - but keeping the boat under 15 metres has some huge advantages in Queensland Australia
. Over 15 there are a whole heap of insane regulations
that you start to have to comply with.
Australian Aluminium Cats -
Peter Kerr (Lizard Yachts) started with his lizard of Oz. He and his family
lived on board and sailed and cruised for years. He went on to design and build a whole heap of aluminium boats. Really nice guy. Peter is still active in the field and is in Tin Can Bay in Queensland
Owen Easton also lived and sailed his own boats and is still building bare shells in Brisbane
in Qld. I haven't met Owen but people who have suggest he too is a nice guy.
Tim Mumby - met him briefly once, about 5 years ago he designed and was involved in the build of a number of 48 foot cats - called the Cyber. As far as I know he has been busily circumnavigating for the last few years. There was (is?) a link to another baot builder
with the early Cybers - may still be - a guy called Wayne Hill, Wayne's web site has some data on the first boats - but it appears that he is looking to build the design in Composite rather than aluminium now.
Wayne hills webiste with commentary on the first 4 cybers.
select the windspeed 48
Crowthers (mainly in the era after Loch - I think) also designed a number of cruising cats in aluminium.
I really like aluminium boats - two big disadvantages - anti-foul - not known for its performance and - dissimilar metals - you need to be vigilant about ensure they dont get together.
Reputedly the Cyber boats all perform very very well and appear to have good cruising load carrying capability.
(there is in my view a clear lineage from Lizard of oz in terms of hull
shape - but thats not a matter I think I need to explore here.)
As I indicated earlier - a friend overseas has asked me to have a look at the Cyber thats currently on the market - I look forward to that.