Need help choosing 532 laser

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Yeah a 520 would usually be cheaper per mW at 500mw+, but a NUGM01T build is still out of my price range. I really do like the 1W spiker by sanwu and with its unlimited duty cycle I know it's high quality, but the price is still too much ;(

The advantages of a 532 are the good beam quality and the slightly higher luminous efficiency. 520 is a prettier color though IMO

If it is not an urgent need--wait a little bit and save up the extra dollars needed to go with best quality--then you don't have to buy another unit to upgrade the quality and/or features.