Hi John,
That chart you've linked to has me confused and feeling it is miss leading. It leaves out a lot of information to have their claims make sense, and it implies what to me look like outright lies. It implies that you will see more with a 3.5" Mak than a 15" reflector. That is a just untrue as Malcom explained.
The only thing I can recommend is that you get to a local star party or astro club meeting and see what all these telescopes look like and how they work. There you will see the inexpensive to the outrageously expensive, and be able to gauge for yourself what best suits you.
Have a look in the Star Parties forum for star parties closest to you. There are two usually listed there for around Sydney at Mangrove Mountain (the Pony Club) and Katoomba (Katoomba Airfield). Sometimes others in Randwick or at Macquarie Uni. Also look in the "Our Community" heading in the left margin for astro club listings.
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