I'll throw my vote to the Powermatic II (electric) and another UK poster reported finding it in UK for approx 70 British lbs. I've gone thru 2 of them, very forgiving machine in terms of varying moisture levels in the tobacco and different cuts. First two machines i got between 25,000 to 30,000 cigarettes stuffed (only going by the number of cases of tubes i bought, 10,000 / case). I'm on my 3rd one and couldn't be happier - and the folks at Zico, the distributor are super on customer support. I needed a new power cord, (rubber insulator had cracked near the plug) - had it in 3 days from date of order by US mail, $6.85 shipped. 2 weeks ago i needed a rubber insert that goes in the square piston that clamps the cig tube to the injector nozzle, they sent 2, free.
and found they have dis-assembly / assembly manuals for both the PII and the PII+ - the only difference between the two models seems to be the fact that a couple of the sub-assemblies in the unit now bolt or screw to each other on the PII+, making dis-assembly easier on the PII+.
i posted shots of the dis-assembly/assembly tutorials over on RYO
http://www.cigreviews.com/forums/ryo-roll-your-own-cigarettes/5545-powermatic-ii-parts.html
i decided to order one of the black square piston parts thinking when i dis-assembled the unit i'd probably find wear on the back end of the piston - was here in 3 or 4 days, and iirc $7.35 shipped. Ended up didn't need it
but they have my kudos for support and really reasonable parts prices