Power is one thing. Clarity is another. Folks at the range couldn't see the bullet holes at 100 yds with their 40x telescope. I loaned them my Leupold and suddenly they could see. My point is that unless you're familiar with the company, test the glass first. Buying over the net denies you this decision making test.
Vigilantibus et non dormientibus jura subveniunt. Molon Labe!