Geoff,
As Darren mentions he has the older 6"/F5 Vixen newt and they are superb telescopes. I like them a lot.
Vixen used to also make a 5" or 130mm (can't remember which) newt that was fairly fast at between F5 and F6. I have also used one of these and it was superb. I think the quality of the older small vixen newtonians may be a little better than the more recent versions which may even be made under contract for Vixen in China or Taiwan. Consequently, if you have some time you may end up with a nicer telescope purchasing a 2nd hand OTA and then matching it with the Vixen porta mount.
CS-John B
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