Hi Jowell and welcome to IIS!
I will try and answer what I can
1) The scope itself is fine. Haven't dealt with the company so cannot offer opinions on them. 10" is a nice size, still portable but will give great views.
2) The 2 eyepieces give different powers. The 25mm gives about 50x and the 10mm about 125x. For most DSOs the 25mm will give good views. The 10 will be harder to focus and have a narrower FOV, but on good nights will give nice views of planets. Both will have a 1.25" barrell (the part that is inserted into the focuser) so you use the adapter to use these eyepices. If you later on get an EP with a 2" barrell (usually a widefield) then you take the adapter out.
3) I have used both RA and striaght through finders and both have strengths and weaknesses. Yes the neck doesn't alway enjoy the stright through finder, but the view matches the telescope view. The RA is more comfotable and is correctly oriented but you have to mentally flip the view when you move to the main scope. Try both and see what you think. I am used to the RA finder now but it took a little getting used to after 6 months with the straight finder.
4) With collimation, do not fall into the trap of assuming a laser fixes all ills. It is the final step in the process. I use one each session in my 12" to check and do a full collimation check avery month or so (depending how much observing I do. A good guide to laser less collimation is here.
http://www.astro-baby.com/collimatio...on%20guide.htm
Farpoint and Hotech are probably the pick but I only use a fairly cheap laser myself!
5)I use a cheap moon filter and it is OK. I think it is a Meade one and it does OK. Use it more on planets to reduce glare a bit as I rarely look at the moon. On a good night the 10mm at 125x will give nice views of the moon.
6) I have a Bintel observing chair and it is the shizzle ( that means really good if you are not familiar with the term!) Use it all the time. Some DSO need you to spend 10 minutes just looking to try and catch a glimpse so being about to sit is a real boon. They are well made and a great place to sit your eyepiece box while setting up. Only thing is they are black to easy to trip over in the dark. A few bits of reflective tape may help with that.
7) I'll leave camera attachments alone as I am far from an expert in this area. Suffice to say that dobs are pretty much a visual only scope unless on the moon or brighter planets. I can recommend Mike Covingtons book here
http://www.bintel.com.au/Accessories...oductview.aspx as a good intro to basic imaging.
8) Other stuff. Dew protection. A must unless you live in really dry environments. My favorite basic chart is The Cambridge Double Star atlas. Has better maps than the regular cambridge atlas, inexpensive and most interesting DSOs are listed along with '000s of double stars. Try and get hold of an old copy of Hartungs, check out Stephen O'Mearas observing guides.
If I think of anything else I'll post more!
Malcolm
