The Elite 7 HDI is a lot of unit for the money. However I am in the process of upgrading mine to an HDS 7 touch with Lowrance because the processor in the Elite will not handle the Navionics chip. It has a 60 to 90 second delay when you try to zoom in or out or move across the lake at speed. Lowrance just released update 4.0 to improve this issue, but I had gotten tired of fighting the slow response.
The graphics on 2D and DI are very good and if you use the built in mapping or a chip from Lowrance you won't have the delay issue. Take that away and it is a lot of bang for the buck. I bought mine from Brian at BBG Marine and he beat all prices I found elsewhere.
Mark 1:17 ...I will make you fishers of men