HPS is HPS. The spectrum is all the same, the efficiency is all the same. More lumens, like 160,000, either means they're lying or they're overdriving it slightly, which means the ballast will be using extra power. Its a marketing gimic, don't fall for it. Buy a quality bulb (because the cheap ones are likely to be stretching the truch on their specs) but don't get too hung up looking for something special.

Enhanced HPS like the hortilux are still exactly the same HPS spectrum, but with 5%-10% blue added in, almost like having a little 100W metal halid in there. In fact the original 430W enhanced HPS was precisely a 400W HPS plus an extra 30W of blue spectrum. There is some variation here on exactly how much blue they add.

The big differences between HPS lamps are mostly in the ballasts. There are now electronic ballasts, more efficient, available up to 600W, but not at 1000W yet so far as I know.

Check out the 400w mastercolor ceramic metal halide by philips.

I have used the Hortilux bulbs now for 5 years, and I'm very happy with there performance. There par rating i believe is around 350PAR for the 1000W. They have just came out with the new Hortilux Blue Lamp. It has the most complete spectrum I have ever seen on a HID Lamp. Spendy, but looks really cool.