[UK-CONTEST] Amplifier Advice Please.

[brian coyne]

I would appreciate any views on Heatherlite amplifiers for serious contesting. I have read reviews on e-ham which are mixed opinion but I don't recognise any of the reviewers as contesters. 
 
I was intent on importing an Ameritron ALS1300 but a local ham has offered the above which would save a lot of hassle as well as expense. I could suck it and see but I am no dab hand with the soldering iron and am also wondering the cost of replacement 3-500 bottles. This amp is pre ' Linear Amp' days and labelled as Heatherlite.
 
The amp I require will need to work hard for  24/24 or 36/40 hours in an 48 hour event so tendency to overheat is a no no.
 
The ALS1300 is a new model, does anyone know anything about it?
 
Are there any opinions on Ameritron amplifiers?
 
Thanks in advance for any help.
 
73  Brian 5B4AIZ..