I'm 63 and work about 12 hrs a week on the glass.
I've got an Smax 47 at the moment, only used on a few jobs with the bottom 2 sections detached.
Around £500 for a new SLX 35 or maybe an Smax 35
Around £1000 for an extreme for a part timer like me mmmmmm!!!! 
Thought I'd go for either the Smax Mk 2 or SLX.
About 40 quid difference in price.
Thanks for the replies so far lads, even Daz, bless him
If i can cope with  the Smax at the moment, i think i might give the extreme a miss, my Mrs would blow a blood vessel or two, seeing as she's after a new kitchen 

Oh and it's straight up work Daz 

 (comercials with great hourly rate) 
The Smax 47 will be getting refurbished and put on ebay