Help With Bulb Choice

I have a Lumatek 600 watt switchable, tunable ballast, and a DayStart air-cooled fixture. I plan to use a 400 watt MH bulb for vegetation, and a 600 watt HPS bulb for flowering.

So what bulb brands should I consider? Hortilux? Son Agro? Any others?

Thanks.

eye hortilux all the way bro