[Mr. Subatomic]

Howdy yall.

I was wondering if anyone could tell me what it is that sets the Telrad apart from other (ofter cheaper) red dot finders and whether it is a good investment.

Also, I am interested in purchasing a barlow lens but am in the dark as to the power I should go toward. I am not sure whether to purchase a 2X or a 3X, or even beyond. I own 9mm, 12mm, 15mm, 20mm and 26mm eyepieces and read on the Bintel website that the highest practical magnification for most telescopes is around 300X. Does this mean that I should purchase a lower power Barlow that most suitably meets this magnification wit my highest power eyepiece, or should I purchase a high power Barlow that would meet the limit with a low power eyepiece?

If anyone could help me out here I'd very much appreciate it. Thanks!