C1133 I had and Elite 7 and I was very pleased with the DI images. However they had a problem with the processor handling a Navionics chip. Every time I would try to zoom in or out the screen would go blank for as much as 2 minutes. Also happened if you were running on plane, when the cursor got to the edge of the display and tried to refresh you were flying blind for a minute or more.
The good news is the HDS 7 Touchscreen is a plug in swap for the 7 and they offered to upgrade me for around $200. I ended up with a $1200 unit for a little more than half the price and it is one fine unit, so you might see if they offer that. One warning though, I realized it has side scan also if I were to purchase an LSS2 transducer so the $200 turned into $400, but with the Elite 7 transducer it will give you DI and 2D just great and the touchscreen is so much easier to use.
Just as info here is a shot of a brush pile in DI and 2D on the Elite 7. As you can tell it is much easier to see the tree in the DI screen. So you should get shots like that on the 7.
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