I have bought a couple optics from CameraLandNY and was very happy with the products at the prices and with their service.
I think Minox is very good value for money. Too many people say that of Vortex, also, for me to discount it, but I haven't tried any of that brand myself.
Higher magnification makes poor quality optics more obvious and can be tiring to use for longer. And even if the quality is good it emphasizes any tremor in your hands, which also tires your eyes. Traditionally 7x was thought to be the highest most people could use handheld without too much image shake, but with lighter materials in modern equipment you might be o.k. with more power.
Magnification also affects brightness. Divide the objective lens size by the magnification power to discover the size of the exit pupil. This tells you how bright the image can be. E.g. a 7x50, 8x56, 9x63 all have a 7mm exit pupil, which corresponds to the largest opening typical in human eyes in darkness, so those would give the best low light performance (as long as you are comparing equal quality of glass and lens coatings.)
And that large exit pupil is for young adults. As we get older our pupils can't open as wide, and a 5mm exit pupil is a typical maximum in your forties, so a good quality 7x35mm bino could seem as bright as a similar quality 7x50mm, and you might as well have the lighter, smaller 7x35 if that's you.