Here are some of my store stats.......based on last 12 months
sold 12 Ushio bulbs(all wattages) 1 returned
sold 144 XM bulbs (all wattages and temps) 6 returned
sold 235 CoralVue bulbs(all wattages and temps) 27 returned
sold 24 "new style CoralVue bulbs 0 returned
sold 11 Radium bulbs 2 returned
BTW some of the returned bulbs worked fine on our test ballast,
which are magnetic type
sold 19 ARO electronic ballasts 1 returned
sold 37 CoralVue electronic ballasts 1 returned
sold 12 Reef Fanatic Electronic ballasts 0 returned
sold 49 magnetic ballasts( Universal and Advance) 0 returned
sold 4 Ice cap ballasts 2 returned
This is just an overview of product reliability, I sell all the above products, and these are the results.
As far as what I use..... 2 magnetic 250 watt MH ballasts, with one XM 10k and one XM 20k. 2 CoralVue 250 watt electronic ballasts with a CV 250 14k and a Radium 20k. 2 Reef Fanatic 250 watt ballasts with a CoralVue 10k and a XM 20k. Personallly, I have had great luck with all the above products used on my tanks.......
Hope some of this helps you........And remember, whoever you buy from, make sure they stand by the products they sell, and you have nothing to worry about!
Thanks,
Joe