Hi all and thanks for the replies!
I fear I might suffer from aperture fever!, and my concern is that in 8 months time I may be inclined to purchase a 16" DOB!!!
What is the limiting mag of a 8" DOB versus a 10" DOB? I recall my 12" DOB that Steve has was around 14.5 as a limiting mag, but can't seem to find the site for the specs? Edit: just did a quick google and it appears that a 10" DOB has a limiting mag of 14.5 (so I assume a 12" is around 17?)
If I go for a 10" (this seems to be my choice) is it worthwhile paying more and getting a Truss dob design e.g. Meade? If not, i.e. standard dob base etc, what extras should I get?
Further edit: Just saw this site:
http://observers.org/tac.mailing.lis.../Apr/0494.html
Is 10" therefore the best bang for buck - I was surprised to see little or no difference between the 12" and the 16"
Also which would be a better low maintenance scope - the Truss or the traditional design? By that the one which would require less collimation etc overall.