Upgrading to 1000W but do I go Digi???

Well its time i dump the old 400W and I think Im ready for a 1000W and quite messing around

Im gonna go to 1000W. And sicne Im getting a new system, nows the time to decide if I should go with the new technology and get a Digital Ballast. Or should I stay with the magnetic coil type?
Im not worried about the extra cost of the Digi.
I would like to drop ANY cost in electricity.
Less heat to worry about things touching it and burning.

This is what Im looking at. Is it worth the price $550 (w/ added MH bulb, not incld )
http://www.htgsupply.com/Product-Lumatek-1000-Watt-Digital-HPS-Grow-Light.asp

or is this just as good $360 (BOTH bulbs incld )
http://www.htgsupply.com/Product-Digital-Greenhouse-Ultimate-1000-watt-HPS-&-MH-Grow-Light.asp

OR is the Old Magnetic type worth staying with??
I belive the 2 Digi Im looking at are just basing it off of name brand. Is Lumatek the best in Digi ballast, compared to Digital Greenhouse?
Is Lumatec "name brand" and Digital Greenhouse "generic Brand"? casue i have no problem paying extra for better quality.

So with price set a side ( i guess) would it be the better choice to pick the lumateck over the Digigreen house?
Ive found 2 types of those also. Each only being about 20-40 cheapier than the Digital version

Thanx for all help and info with this.
Current grow as of 2-11-11 2 Pineapple Express, 2 Chiesel, 1 Smurfberry, 1 Himilya Blue Diesel all 4 weeks old on 400W closet grow all foxfarms stuff

Be prepared for the increase in heat....I have a 1000w and a 400w hps with magnetic ballast and another 400w digital.....that damn 1000 is a HOT MF...REQUIRES cooling.

It will be plenty cool. Since im planning on moving my set-up out of my closet and into my room. My sisters moving out, so my personal stuff is goin in her room and my room will be switchd to my new grow room. But Ill close it off with mylar so it only a 10x10 room, with the ballast outside the mylar, but still in my room.